I got a chunk of 40 polyp mixed Zoos lasr Friday. It started opening, then I did a tank clean with a small water change. Only 3 Gallons or so. I have a 24 Gallon Nano. 1 Firefish,1 Royal Gramma, 1 Yellow goby. 15 or so assorted Hermits. and, 8 Snails..I think..Everything else is doing fine. The Crabs are doing so well, I could open a Red Lobster. So, wait a while longer for the Zoos to quit pouting? chems are fine