Calcium tends to run out fast in aquariums, especially in reef aquariums. Corals use up a lot of calcium while developing, so it is very essential that they have a generous supply of it when forming their exoskeletons. But just like with anything else, too much or too little of a good thing is bad, so it's also equally essential to have a system of maintaining the balance of not just calcium, but other chemicals in the water as well.
The ideal scenario is maintaining a ratio that is very close to what can be found in the sea. A product such as the Two Little Fishies C-Balance from Pet Store
aims to achieve that goal.
The Two Little Fishies C-Balance is made up of two bottles of supplement in liquid form, designed to replenish calcium. Aside from calcium, it also adjusts levels for strontium and magnesium until the ideal ratio is reached. It simulates a real seawater environment through the adding and then controlling the minerals normally found in oceans.
The Two Little Fishies C-Balance also restores buffering capacity, or the resistance to changes in pH levels. This resistance ensures the stability of the alkalinity levels of the water and prevents sudden rise in acidity that can be harmful to aquatic life