Brightwell Calcion Tangs Easy to change Filter Cartridge

Easy to change Filter Cartridge

Naturally Adds Tannins and Humic Acid

Comes in many different colors and variations

It does not harm plants

pH or other important water parameters like other brands

Brightwell Calcion Tangs Easy to change Filter CartridgeConcentrated Calcium Supplement for All Marine Fish & Reef Aquaria Overview Highly concentrated ionic calcium solution. Increases the concentration of calcium in marine aquarium water to provide corals and other reef building invertebrates with one of the most important elements required for growth. Is ionic rather than chelated, and contains no unwanted organic material such as EDTA, gluconate, or polygluconate. Over 50% stronger than most competing