Water Filtration & Temperature Control

Hydroponic water filtration removes chlorine, sediment and dissolved solids so every feed starts clean, while chillers keep the reservoir steady. Hose-fed rooms run a Tall Boy dechlorinator, RO-fed rooms add a Stealth or Evolution system, and warm rooms add a chiller.

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Water Filtration & Temperature Control

Hydroponic Water Filtration and Reservoir Temperature Control

Hydroponic water filtration starts the feed with known water, free of chlorine and sediment and low in dissolved solids. Chillers then hold the reservoir at a set temperature. This collection covers both, from hose-thread dechlorinators to 1,000 GPD RO systems and 1.5 HP chillers, plus Dosatron injectors....

Hydroponic water filtration infographic: dechlorinators, reverse osmosis systems, chillers, chloramine and filter changes

For filters only, see water filters and RO systems. Reservoir cooling has its own water chillers page, and both sit in the wider air, water and CO2 range.

Types of Water Filtration and Temperature Control

Dechlorinators and Sediment Filters

HydroLogic Tall Boy and Big Boy filters pair a sediment cartridge with green coconut carbon. The Tall Boy runs 2 GPM for 7,500 gallons, and the Big Boy 7 GPM for 25,000 gallons. HydroLogic rates both at 99% chlorine removal.

Reverse Osmosis Systems

RO strips dissolved solids so every feed starts near zero. The HydroLogic Stealth RO150 cuts TDS by up to 98%, and the Evolution RO 1200 makes 50 gallons an hour on line pressure. The GrowoniX GX1000-HF produces 1,000 GPD at a 1:1 waste ratio.

Water Chillers

Active Aqua chillers use titanium evaporators and a boost function, starting at 1/10 HP. The EcoPlus 1.5 HP commercial chiller moves 11,935 BTU an hour for up to 300 gallons.

How Growers Set Up Water Treatment

Filter in sequence: sediment and carbon first, then the RO membrane, then the reservoir and chiller. Most growers hold the reservoir at 65 to 72°F, since warmer water holds less oxygen and favors root rot. Pressure gauges on either side of a housing show when a cartridge is loading up.

Frequently Asked Questions

How do you remove chloramine from water for plants?

Standard green coconut carbon is not rated for chloramine, as HydroLogic notes for its Tall Boy and Big Boy. Swap in a KDF and catalytic carbon cartridge such as ChloraShield. The Evolution RO system runs that pre-filter as standard, and GrowoniX offers a KDF/CAT upgrade.

Carbon filter vs reverse osmosis: which do I need?

A carbon dechlorinator removes chlorine and sediment but leaves dissolved minerals in the water. Reverse osmosis strips 95 to 98% of dissolved solids, at the cost of drain water. Many growers run both, with a Tall Boy ahead of the RO to protect the membrane.

What size chiller for a 100 gallon reservoir?

Size by heat load as well as volume, so check the maker's chart for your room temperature. Active Aqua rates its 1/10 HP unit at 1,020 BTU an hour. The EcoPlus 1.5 HP handles up to 300 gallons, so larger systems step up from there.