Frogspawn keep melting... Help

[Proteus]

Nor will I argue but this is out of a artical from reef builder

Besides fueling algae growth, phosphates can retard the uptake of calcium by calcifying corals. This of course is bad news for reef keeping aquarists who house a lot of hard corals. The corals will slow their growth rates as phosphate concentration rises. Some may even begin to die or have tissue recession. The latter part is obviously an extreme case, but it can happen when phosphates reach higher concentrations. A slowed calcification not only means slow growth, but slow repair when damaged by fragging or hands moving about the aquarium.