KH + CA 2 500ml.

KH + CA 2 500ml.

KH + CA 2 500ml is a solution designed for a quick boost in your calcium levels. Just 10ml of KH + CA 2 provides 200 mg of readily available calcium. The optimal calcium level in seawater is between 400 – 450 mg/Liter. Remember to add KH + CA 2 to your aquarium only in combination with an equal amount of KH + CA 1.