Is it really all that bad to add hardy coral to a new tank going through a diatom bloom? I have my uv running and use ro/di water so I imagine it would just fade instead of turning into hair algae. Tanks 2 months old nitrates are under 5 ppm and parameters have been stable a good while, phosphates very low as well. I really want some star polyps or possibly a frog spawn. And yes I have seen the cycle stage thread on here l.