I've just had a massive zoa melt-off, but my shrooms are doing great and dropping little shrooms like crazy. So I've come to the conclusion that if the shipment of zoas I'm getting from Matty don't do well, I'm done with zoas in my big tank and sticking to shrooms. OTOH, the zoas in my tiny tank are growing like MAD! I use the same salt and have the same water change schedule with both tanks. Params are very similar, and my tiny tank is stocked far heavier than my biggun. I have no idea why zoas are flourishing in one tank and melting in the other. Oh well. Like I said, if this next crop of zoa frags doesn't do well, I'm a shroom girl all the way!