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...

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

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

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...

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

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

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...

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

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

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...

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

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

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...

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...

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

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.

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

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

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

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...

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...

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...

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...

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...

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 ...

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 ...

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...

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

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...

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

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) ...

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...

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...

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

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

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...

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

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...

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...

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.

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...

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

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

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...

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.

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

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...

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...

UV quartz sleeve for BIGboy system. 8 GPM.