My zoas growth is very low, the polyps couldn't look any better, big and beautiful, just not very many babies, some frags none, some one or two. I have had my hands in the tank alot lately tearing the live rock apart catching unwanted fish, and I am sure this didn't help, but the problem has been going on much loger than that. Water temps are fine around 8o. I am only doing water changes every 2 1/2 weeks now, was doing them every week and figured out my zoas didn't like that and look much better now with less water changes. For a refresher: 125g tank, MH lights and T-5 lights (2 blue two white) The MH and T-5s over lap just a bit on their coming on and going off stages. 200g octopus skimmer, running GFO and Carbon 24 7 also. Flow in the tank isn't good enough for an SPS tank, but good enough for my soft coral, recordia, zoa tank. At one point I was starting to turn my skimmer off 2 days and running it the third day, but the RBTA didn't like that and started moving around the tank, so I started running the skimmer 24 7 again. The RBTA got into my power head and got chewed all to pieces and I never did go back to skimming 1 skipping 2. Skimming is the only thing that I can think of that might be the problem. I used to lose a frag of zoas every so often to melting when when I first started, dosn't happen any more, the polyps get big and look great, just don't grow babies. I have one colony of some green polys, started out with 5 or 6, now I have about a 100 or more of them, have a frag of 9 Armor of Gods I got a year ago, still have 9. I have tried moving them around the tank and where I have them now they like and look the best, just no babies. Have a friend that has great growth and we have talked, the only differance, she runs no skimmer. Other frags I have also stay small.
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