Sharing my pain

[Delphinus]

My tank being considerably smaller than most other SPS type tanks (48x18x20) it is a challenge to maintain adequate flow as the corals keep growing. I have a bit of a battle against slow necrosis sometimes. For now the solution is if I notice an area of coral tissue that looks off I try to add a powerhead. A stream or a penductor isn't an option since I have about 4" of free space above the reef (less above my cap). A stream type flow, although called for, will do more damage than good in my case; so I'm stuck with using a lot of powerheads.

I won't make this mistake on my next SPS tank, the next setup for that will be a lot taller. Much easier for flow conditions, I think (I hope).

But when it's a flow shadow that's causing me problems, it tends to be on one coral that's in a flow shadow, and a particular localized spot. Not an overal general necrosis in a number of them.

So I understand your worry Brad, I hope that whatever it is goes away and things settle back.

Weird stuff. Could it be some kind of allelopathy perhaps?