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Pour Brightwell Refractometer & Hydrometer Calibration Standard fluid carefully into hydrometer to avoid bubbles
Can be used for marine water
TGR HPP-01 (High Porosity Activated Perlite) hanna as well as natural enzymesUltra porous filter aid mechanical filtration media for freshwater and saltwater aquarium system. Traps and binds particulate organic material and removes oils, grease, dirt and mulm from water column. Long lasting and washable. Best used in conjunction with TGR GAC. Recommended in a canister filter or media reactor. Directions: Put HPP 01 in a media bag, briefly rinse with purified water then put it inside your filter sock, or in the first chamber of