Aquarium Co-Op Crushed Coral

Helps raise and stabilize pH Increases KH to reduce pH swings Adds beneficial hardness to the water Crushed coral is a simple, natural way to increase pH, KH, and overall water hardness in aquariums with soft or acidic water. It’s especially useful for keeping fish, shrimp, and snails that thrive in harder, more alkaline conditions. As the coral slowly dissolves, it releases minerals into the water. Lower pH levels cause the coral to dissolve more quickly, while higher pH levels naturally slow the process down. In addition to slightly increasing GH (general hardness), crushed coral significantly raises KH (carbonate hardness), which helps stabilize pH and prevent sudden fluctuations. Directions & Specifications Because crushed coral is a natural material, it may contain some dust when first opened. To avoid cloudy water, rinse it thoroughly before use. Place small amounts into a fish net or strainer and rinse under running water until the water runs mostly clear. Once rinsed, it’s ready to add to the aquarium. When mixed into gravel or substrate, a common recommendation is about 1 pound of crushed coral per 10 gallons of water. Depending on your tap water’s pH, the coral will gradually dissolve and may need replacement every 1–2 years when used in the substrate. To keep track of water chemistry, regularly test your pH and KH using aquarium test strips or liquid test kits. This will help determine when additional crushed coral is needed. If used inside a filter, crushed coral tends to dissolve faster due to increased water flow. Smaller amounts are usually sufficient in this setup, but the media often needs replacing every 1–3 months.