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Hydrologic

Hydrologic MicRO RO System, 75 GPD

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Micro sized, portable reverse osmosis system. Entry level, economical solution. 75 gallons per day. Includes KDF/carbon pre-filter and 75 GPD membrane. Also comes with...

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Hydrologic Quick Disconnect, 3/8" x Garden Hose Adapter

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Quick Disconnect 3/8" X Garden Hose Adapter. Does not include hose. Also available in a 1/2" size. Comes in white.  

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Hydrologic stealthRO 100/200 Pressure Gauge/Fitting Assembly

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Designed for use with the Hydrologic stealthRO Reverse Osmosis 100/200. The pressure gauge/fitting assembly can be purchased separately.

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Tube Snips

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Safely and neatly trim your hydroponic tubing in a snap with tube snips by Hydrologic. Other scissors and shears can do severe damage to your tubing, fraying and fract...

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Tube Snips

$10.50
$10.50

Tube Snips

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Hydrologic Float Valve, 1/4"

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Float Valve, 1/4", works to maintain proper water levels in your Hydrologic water filtration system. 

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Hydrologic Float Valve, 3/8"

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Float Valve, 3/8", helps to maintain proper water levels in your Hydrologic water filtration system.

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Hydro-Logic De-Ioniazation for micRO 75, 2 In. x 10 In.

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micRO-75 Add-on DI Filter Cartridge Kit This de-ionization filter is designed to serve as a post, polishing stage for any Reverse Osmosis system. After an RO system, t...

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Hydrologic Upgrade Kit to Convert Tall Boy to stealthRO 100

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Use the Hydrologic reverse osmosis water filter Upgrade Kit to convert your Tall Boy to stealthRO 100 to customize your indoor hydroponic garden.

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Hydrologic Pump Protector & Inlet Filter, 1/2"

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Protects booster pump from sediment and other particles. Cleanable stainless steel mesh screen. Clear housing. 1/2 in fittings included to hook directly onto inlet o...

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Hydrologic QC 3-Way Splitter, 3/8"

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Use the Hydrologic reverse osmosis water filter 3/8" 3-way divider to customize your indoor hydroponic garden water purification system.

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Merlin GP UV Sterlizer Kit

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The 1 GPM Ultraviolet Sterilizing filter makes sure that any possible bacteria or harmful microorganism coming out of the Merlin Garden Pro are dead. This is for those...

$149.95$164.959% off
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Merlin GP UV Sterlizer Kit

$149.95$164.959% off
$149.95 $164.95 10% off

Merlin GP UV Sterlizer Kit

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Union connector 3/8"

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Hydrologic's 3/8" Union Connector for use with Hydrologic Reverse Osmosis water-filtration systems. Customize your hydroponic indoor garden.

$5.95$6.559% off
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Union connector 3/8"

$5.95$6.559% off
$5.95 $6.55 10% off

Union connector 3/8"

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Union connector 1/4"

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Hydrologic's 1/4" Union Connector for use with Hydrologic Reverse Osmosis water-filtration systems. Customize your indoor hydroponic garden.

$4.95$5.459% off
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Union connector 1/4"

$4.95$5.459% off
$4.95 $5.45 10% off

Union connector 1/4"

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DM-2 Industrial Dual TDS Monitor

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Measure the untreated water coming in vs. the purified water going out of your reverse osmosis system at any time. This is important in determining when the RO membran...

$82.95$91.259% off
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DM-2 Industrial Dual TDS Monitor

$82.95$91.259% off
$82.95 $91.25 10% off

DM-2 Industrial Dual TDS Monitor

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Tall Boy De-chlorinator & Sediment Filter

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Removes up to 99% of chlorine and 90% of sediment, rust, silt, etc. @ 2 GPM. Easily produces 120 gallons per hour of clear water filtered down to 5 microns. Filter cap...

$203.95$224.359% off
$203.95 $224.35 10% off

Tall Boy De-chlorinator & Sediment Filter

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Tall Blue Replacement Sediment Filter

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For use with Hydrologic's water filtration systems. This is a replacement sediment filter for Tall Blue (HLTBL) or Tall Boy (HLTBY) units.

$15.25$16.789% off
$15.25 $16.78 10% off

Tall Blue Replacement Sediment Filter

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Tall Blue Replacement carbon filter

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For use with the Hydrologic water filtration systems in indoor garden hydroponics. This is a replacement carbon filter for Tall Blue (HLTBL) or Tall Boy (HLTBY) units.

$34.63$38.099% off
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Tall Blue Replacement carbon filter

$34.63$38.099% off
$34.63 $38.09 10% off

Tall Blue Replacement carbon filter

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1/2 inch Natural tubing, 250 feet per roll

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Customize your indoor hydroponic garden water filtration system with Hydrologic's 1/2" natural-colored tubing. Comes in 250 foot roll.

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3/8" White HydroLogic Tubing 500'

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Customize your indoor hydroponic garden with Hydro-Logic's 3/8" white tubing for water filtration systems. Comes in a 500 foot roll.

$164.95$181.459% off
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3/8" White HydroLogic Tubing 500'

$164.95$181.459% off
$164.95 $181.45 10% off

3/8" White HydroLogic Tubing 500'

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3/8" Blue HydroLogic Tubing 500'

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Customize your indoor hydroponic Hydrologic reverse osmosis water filtration system with 3/8" blue tubing. Comes in a 500 foot roll.

$164.95$181.459% off
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3/8" Blue HydroLogic Tubing 500'

$164.95$181.459% off
$164.95 $181.45 10% off

3/8" Blue HydroLogic Tubing 500'

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1/4" Blue HydroLogic Tubing 500'

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Hydrologic's 1/4" blue tubing. Comes in a 500 foot roll. For use in customizing your indoor hydroponic garden with the Stealth RO and Small Boy reverse osmosis water f...

$115.95$127.559% off
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1/4" Blue HydroLogic Tubing 500'

$115.95$127.559% off
$115.95 $127.55 10% off

1/4" Blue HydroLogic Tubing 500'

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UV Kit / Stealth RO

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Ultraviolet (UV) sterilizer for after-stealthRO water. Assures 100% of bacteria and viruses are sterilized. Its UV treatment kills all living bacteria and microbes and...

$132.55$145.819% off
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UV Kit / Stealth RO

$132.55$145.819% off
$132.55 $145.81 10% off

UV Kit / Stealth RO

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Small Boy Replacement Sediment Filter

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Replacement sediment filter for Small Boy RO filter. Regular rotation of the Small Boy Sediment Filter in the Small Boy Dechlorinator is recommended to keep silt, rust...

$12.18$13.409% off
$12.18 $13.40 10% off

Small Boy Replacement Sediment Filter

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Small Boy De-chlorinator & Sediment Filter

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Removes up to 99% of chlorine and 90% of sediment, rust, silt, etc. @ 1 GPM. Easily produces 60 gallons of clear water per hour filtered down to 5 microns. Filter capa...

$112.15$123.379% off
$112.15 $123.37 10% off

Small Boy De-chlorinator & Sediment Filter

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Stealth Replacement Membrane

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These membranes are standard equipment in our SP, CHP, MPRO, MPDI RO/DI, and the MPDW Drinking Water Systems. All 25 to 90 GPD membranes will fit in our standard membr...

$93.78$103.169% off
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Stealth Replacement Membrane

$93.78$103.169% off
$93.78 $103.16 10% off

Stealth Replacement Membrane

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Stealth Sediment Replacement Filter

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Replacement filter for Hydrologic's stealth-RO 100 Customized Reverse Osmosis Sediment Filter (HLRO100). Easy to install. Keep your water filtration system in tip-top ...

$16.27$17.909% off
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Stealth Sediment Replacement Filter

$16.27$17.909% off
$16.27 $17.90 10% off

Stealth Sediment Replacement Filter

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Stealth/Small Boy Carbon Replacement Filter

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Replacement green carbon filter for Hydrologic's stealthRO brand of reverse osmosis water filtration systems. Easy to install. Keep your systems in tip top shape with ...

$18.32$20.159% off
$18.32 $20.15 10% off

Stealth/Small Boy Carbon Replacement Filter

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Stealth RO 100 & 200 Booster Pump

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The stealthRO Pressure Booster Pump increases the flow and efficiency of the StealthRO 100 water filtration system, boosting inlet pressure to 70 psi. The stealthRO ne...

$229.44$252.389% off
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Stealth RO 100 & 200 Booster Pump

$229.44$252.389% off
$229.44 $252.38 10% off

Stealth RO 100 & 200 Booster Pump

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Merlin Booster Pump

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Active Aqua Hydrologic brand booster pump for the Merlin Reverse Osmosis filtration system. Can be purchased separately. 

$369.20$406.129% off
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Merlin Booster Pump

$369.20$406.129% off
$369.20 $406.12 10% off

Merlin Booster Pump

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Merlin Sediment Replacement Filter

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Replacement sediment filter for the HydroLogic Merlin Reverse Osmosis water filtration system. Easy to install. Helps to keep your water filtration system in tip-top s...

$25.95$28.559% off
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Merlin Sediment Replacement Filter

$25.95$28.559% off
$25.95 $28.55 10% off

Merlin Sediment Replacement Filter

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Merlin Membrane Replacement Filter

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Replacement membrane filter for the HydroLogic Merlin (Garden Pro) Reverse Osmosis filtration system. Easy to install. Keep your filtration system in tip top shape.

$156.95$172.659% off
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Merlin Membrane Replacement Filter

$156.95$172.659% off
$156.95 $172.65 10% off

Merlin Membrane Replacement Filter

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Merlin Carbon Replacement Filter

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Keep your water filtration in tip top shape by replacing your carbon filter as needed. This carbon replacement filter is intended for use with the Merlin (Garden Pro) ...

$34.95$38.459% off
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Merlin Carbon Replacement Filter

$34.95$38.459% off
$34.95 $38.45 10% off

Merlin Carbon Replacement Filter

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Carbon Filter for Tall Boy and Tall Blue

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Now chloramines, iron, hydrogen sulphide and heavy metals don't stand a chance against Hydrologic's newest offering in replacement filters for all their water filter u...

$84.62$93.089% off
$84.62 $93.08 10% off

Carbon Filter for Tall Boy and Tall Blue

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Replacement Carbon Filter for Small Boy/Stealth

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Now chloramines, iron, hydrogen sulphide and heavy metals don't stand a chance against Hydrologic's newest offering in replacement filters for all their water filter u...

$43.82$48.209% off
$43.82 $48.20 10% off

Replacement Carbon Filter for Small Boy/Stealth

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Float Valve 1/4"

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Float Valve, 1/4", works to maintain proper water levels in your Hydrologic water filtration system. 

$21.37$23.519% off
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Float Valve 1/4"

$21.37$23.519% off
$21.37 $23.51 10% off

Float Valve 1/4"

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Float Valve 3/8"

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Float Valve, 3/8", helps to maintain proper water levels in your Hydrologic water filtration system.

$21.37$23.519% off
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Float Valve 3/8"

$21.37$23.519% off
$21.37 $23.51 10% off

Float Valve 3/8"

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Flowmaster gal Meter

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The Flowmaster by Hydrologic measures how many gallons of filtered water have gone through the your grow system and alerts you when it's time to change filters. You ca...

$64.95$71.459% off
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Flowmaster gal Meter

$64.95$71.459% off
$64.95 $71.45 10% off

Flowmaster gal Meter

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Float Kit for the Merlin Garden Pro

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Float Kit for the Merlin Garden Pro High-Flow Reverse Osmosis System. Helps to adjust water levels in the water filtration system.

$42.00$46.209% off
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Float Kit for the Merlin Garden Pro

$42.00$46.209% off
$42.00 $46.20 10% off

Float Kit for the Merlin Garden Pro

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Big Boy Carbon Filter

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Keep your water fresh, your equipment in tip-top shape, and your grow room at its best by making the commitment to exchange your filters. This carbon filter works with...

$84.62$93.089% off
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Big Boy Carbon Filter

$84.62$93.089% off
$84.62 $93.08 10% off

Big Boy Carbon Filter

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Big Boy Pleated Cleanable Sediment FIlter

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Keep your water fresh, your equipment in tip-top shape, and your grow room at its best. This ultra-high capacity cleanable sediment filter removes 90% of sediment. Fil...

$62.17$68.399% off
$62.17 $68.39 10% off

Big Boy Pleated Cleanable Sediment FIlter

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Big Boy KDF85 Carbon Filter

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Hydrologic Big Boy KDF85 Carbon Replacement Filter. The KDF85 Filter is ideal for well water users with iron and sulfur and city water users with chloramines.

$143.77$158.159% off
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Big Boy KDF85 Carbon Filter

$143.77$158.159% off
$143.77 $158.15 10% off

Big Boy KDF85 Carbon Filter

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Big Boy Extra High Flow 420 GPH

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Ultra high capacity instant dechlorinator. Removes 99% of chlorine and 90% of sediment. Comes with cleanable sediment filter and in/out pressure gauges to monitor when...

$469.15$516.079% off
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Big Boy Extra High Flow 420 GPH

$469.15$516.079% off
$469.15 $516.07 10% off

Big Boy Extra High Flow 420 GPH

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Quick Disconnect 1/2" Hose

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Quick Disconnect 1/2" X Garden Hose Adapter. Also comes in a 3/8th inch size. Comes in white. Does not include hose.  

$12.95$14.259% off
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Quick Disconnect 1/2" Hose

$12.95$14.259% off
$12.95 $14.25 10% off

Quick Disconnect 1/2" Hose

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Quick Disconnect 3/8" Hose Adapter

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Quick Disconnect 3/8" X Garden Hose Adapter. Does not include hose. Also available in a 1/2" size. Comes in white.  

$7.08$7.799% off
$7.08 $7.79 10% off

Quick Disconnect 3/8" Hose Adapter

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SPO 3/8 inch Black Tubing, 500 feet per roll

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Reverse osmosis filter tubing in black with a 3/8" outer dimension. Sold in lengths of 500 feet per roll. Extra tubing can be useful for customizing your indoor hydrop...

$164.95$181.459% off
$164.95 $181.45 10% off

SPO 3/8 inch Black Tubing, 500 feet per roll

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Tall Boy w/ Upgraded KDF85/Catalytic Carbon Filter

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Hydrologic's Instant dechlorinator and sediment filter with upgraded KDF85/Catalytic Carbon filter. 15,000 gallon filter life for use with the Tall Boy model.

$244.75$269.239% off
$244.75 $269.23 10% off

Tall Boy w/ Upgraded KDF85/Catalytic Carbon Filter

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Small Boy w/ Upgraded KDF85/Catalytic Carbon Filter

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Hydrologic's instant dechlorinator and sediment filter with upgraded KDF85/Catalytic Carbon filter. Stand alone. 6,000 gallon filter life.

$137.65$151.429% off
$137.65 $151.42 10% off

Small Boy w/ Upgraded KDF85/Catalytic Carbon Filter

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Big Boy w/ Upgraded KDF85/Catalytic Carbon Filter

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Big Boy extra high capacity dechlorinator and sediment filter with upgraded KDF85/Catalytic Carbon filter. 50,000-gallon filter life. Can be used as a whole-house or f...

$539.95$593.959% off
$539.95 $593.95 10% off

Big Boy w/ Upgraded KDF85/Catalytic Carbon Filter

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UV Sterilizer Kit

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Ultraviolet Sterilizer add-on kit provides 100% protection against bacteria, viruses, cysts and pathogens in the product water. Great for well or surface water sources...

$329.95$362.959% off
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UV Sterilizer Kit

$329.95$362.959% off
$329.95 $362.95 10% off

UV Sterilizer Kit

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UV Quartz Sleeve - for BIGboy - 8 GPM

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UV quartz sleeve for BIGboy system. 8 GPM.

$64.95$71.459% off
$64.95 $71.45 10% off

UV Quartz Sleeve - for BIGboy - 8 GPM

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