Why are my zoas not opening all the way?

snewcrash

New member
Almost all of my zoas are not opening all the way. It seems as if they are almost curling or folding up around the edges. I wish I had some pictures, but my memory card just died. Here's my stats:

Tank is cycled for about 1.5 months
75 gallon DT, 55 gallon sump
Vortech MP-40 for flow
6x54watt T5 light fixture. Hangs about 10 inches above water, so most of the zoas are about 18-24 inches away from the light

Here's what usually happens. I put some in the tank, they look great for about a week and then they start 'folding' up. Any ideas?
 
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