kim gross wrote:
Normally Diatom blooms come from Silca.

Silica, right? Silicon dioxide which acidifies when dissolved in water.

And your water source is
normally the main source of diatoms.

You meant silica again, right?


Are you using RO/DI water? If not
I would be willing to bet that you have silca in your water source and
that is causing the diatom bloom.

Interesting. I heard that silica doesn't belong in a reef aquarium, but
I never knew why.

--Kurt