HydroLogic ChloraShield smallBoy/StealthRO Replaceable Upgraded filter (20/cs)

HydroLogic ChloraShield Carbon Filter, the smallBoy and Stealth-RO Upgrade

This is a replaceable carbon block cartridge made for two HydroLogic housings: the smallBoy dechlorinator and the Stealth-RO reverse osmosis system. It takes the place of the standard carbon stage and carries HydroLogic's ChloraShield media, built for chloramine as well as free chlorine. Many municipal suppliers now dose chloramine because it lingers in the pipes, and ordinary carbon struggles to break it down. HydroLogic rates this cartridge for up to 100% chloramine removal at a nominal 1 micron. Flow is rated at 1 GPM, enough to fill a reservoir at a steady pace. Service life depends on the housing. In a smallBoy it runs about 3,000 gallons, while in a Stealth-RO it lasts about 1,500 gallons. The block measures 2.75 x 9.75 in and drops into the existing canister without new fittings. Chloramine in feed water knocks back beneficial bacteria and fungi in the root zone. It also attacks thin-film RO membranes, so stripping it early pays off twice.

Where Chloramine Removal Fits in a Grow Room Water Train

Install the cartridge after a sediment stage, so grit and rust never reach the carbon. On a Stealth-RO, that position protects the membrane, which is the costly part of the system to replace. On a smallBoy, the treated water goes straight to the reservoir or a hose for hand watering. Flush the new block for a few minutes before filling a tank, because fresh carbon releases fine black dust. Mark the install date and the gallons run, either on a meter or with a rough fill count. Carbon gives no warning when it is spent. Once exhausted, chloramine passes straight through even though the water still looks clean. Growers running microbial inoculants or living soil feel that difference first, since sterilised water stalls the biology. Keep the housing out of direct sun and freezing temperatures, which shorten carbon life and stress the canister. The cartridge fits only these two HydroLogic housings, so check the system model on the head before swapping.

Key Features

• ChloraShield Media: A carbon block made for chloramine as well as chlorine, which standard carbon handles poorly.
• 1 Micron Filtration: The tight block catches fine particles that slip past the sediment stage ahead of it.
• 1 GPM Flow: Water reaches the reservoir at a steady rate without starving the housing downstream.
• Housing-Specific Life: Rated for about 3,000 gallons in a smallBoy and about 1,500 gallons in a Stealth-RO.
• Drop-In Upgrade: It replaces the standard carbon stage in the existing canister with no new fittings.
• Membrane Protection: Stripping chloramine before the RO stage spares the thin-film membrane from oxidant damage.

Technical Specifications