Hydro-Logic ChloraShield TALLBoy Replaceable Upgraded Filter (20/CS)

The Hydro-Logic ChloraShield TALLBoy Replaceable Upgraded Filter is a carbon block replacement cartridge designed for the TALLBoy filtration housing. Rated at 2 GPM and 1 micron, it removes 100% of chloramine from city water supplies. Made in the USA with a low pressure drop and high dirt holding capacity. Sold in a case of 20 cartridges for commercial or multi-system operations.

ChloraShield TALLBoy Replaceable Upgraded Filter Specifications

Physical and performance specifications sourced from manufacturer data and canonical product attributes.

Why Choose the ChloraShield TALLBoy Replaceable Upgraded Filter

Chloramine — the disinfectant blend used by most North American municipal water systems — does not evaporate from standing water the way free chlorine does. Standard carbon block filters reduce chlorine effectively, but chloramine requires a specialized media with extended contact time and the right pore size. The ChloraShield cartridge is engineered specifically for chloramine removal, making it a more appropriate choice for city water than a general-purpose sediment or chlorine filter.

• 100% chloramine removal: The cartridge is rated to remove 100% of chloramine, addressing the primary disinfectant used in most municipal water supplies across North America.
• 1-micron filtration: The 1-micron rating captures fine particulates, sediment, and cysts alongside chemical contaminants, delivering cleaner water to your reservoir or RO system pre-stage.
• 2 GPM flow rate: The rated flow rate of 2 gallons per minute keeps system fill times practical without sacrificing contact time inside the carbon block media.
• Low pressure drop: The cartridge is designed for a low pressure drop across the filter housing, which reduces demand on pumps and helps maintain consistent flow through the rest of the system.
• High dirt holding capacity: Compared to thinner or shorter filter cartridges, the TALLBoy format packs more carbon media into the housing, extending service life before a cartridge swap is needed.
• Made in the USA: Domestic manufacture means tighter quality control over media density and end-cap sealing — factors that directly affect whether a carbon block performs to its rated removal specs.

Best Uses for the ChloraShield TALLBoy Replaceable Upgraded Filter

This cartridge is a replacement part for the Hydro-Logic TALLBoy filtration system. It is most applicable in situations where municipal water chemistry is the primary concern.

• City water pre-treatment for hydroponics: Most municipal water is treated with chloramine rather than chlorine. Running source water through a ChloraShield cartridge before it reaches the reservoir removes the disinfectant that can inhibit beneficial microbial activity in organic or living-soil systems.
• Pre-stage for reverse osmosis systems: Chloramine is damaging to thin-film composite (TFC) RO membranes. Placing a ChloraShield cartridge upstream of an RO system protects the membrane and extends its service life. This pairs well with a Hydro-Logic compact reverse osmosis system already in your setup.
• Commercial grows with multiple filtration housings: The 20-cartridge case quantity is practical for commercial or multi-room operations where cartridges are replaced on a scheduled maintenance cycle across several filter housings simultaneously.
• Water quality maintenance in recirculating systems: Recirculating deep water culture (RDWC), NFT, and ebb-and-flow systems all benefit from clean source water because contaminants accumulate with each reservoir top-off. A TALLBoy ChloraShield cartridge in the fill line keeps baseline water chemistry consistent.
• Replacement stock for existing TALLBoy housings: Growers already running a TALLBoy system who want to maintain a case of cartridges on-hand rather than ordering individual replacements on demand.

Compatibility

The ChloraShield TALLBoy cartridge is designed as a replacement for the Hydro-Logic TALLBoy filter housing. Before ordering, confirm your housing accepts a 20.5-inch cartridge with a 3-inch outside diameter — these are the physical dimensions of this cartridge. It will not fit SmallBoy or BigBoy housings, which use different cartridge lengths.

For source water that requires both chloramine removal and broader mineral reduction, this cartridge is typically installed upstream of a reverse osmosis unit. The ChloraShield stage handles chloramine and fine sediment, while the RO membrane addresses dissolved solids including calcium, magnesium, sodium, and heavy metals. If you are evaluating your overall filtration stack, you may also want to review water quality solutions like the Dilution Solutions inline filter with 200-mesh screen for sediment pre-screening before the carbon stage.

The cartridge is compatible with standard city water supply pressures. The low pressure drop design means it can be used with systems that do not have a booster pump, provided incoming line pressure is adequate for the housing and any downstream RO membrane. Manufacturer-published minimum and maximum pressure ratings should be confirmed via the Hydro-Logic product documentation for the specific TALLBoy housing model in use.

Sources & Further Reading