Problem with corals

[Quinn]

I think Bob raises a good point here. A minor cyano case can be controlled fairly easily. Maybe consider some minor tweaks, and as long as it doesn't actually start killing corals, don't worry too much about it. I had a small patch of it in the middle of my sand bed right up until I tore my tank down, and it never really grew beyond that spot. So I didn't worry too much about totally eliminating it.