I have a 20 gallon long with hang on filters set up now for about 13 months with euphylias. The hammers, and frogspawn have done well. About 3 months ago I placed my few remaining zoanthids on the sand in this tank, and, to my surprise, they have done well also. Yesterday, for the first time, I fragged a few zoa, and paly colonies, dipped them in tank water with a few drops of Lugol's solution, and placed them back in the tank. Within a few hours all of the euphylias had retracted their polyps. I started running LOTS of carbon - I keep plenty on hand - and yet, right now, they have only barely started to extend their polyps. Will it just take more time to get rid of these toxins? Am I missing something here? I never expected this. I used to frag zoas, and palys all the time when they were in my main system, and never noted anything like this. I expect that the small water volume of the 20 long tank has something to do with this. Has anyone else had this same experience? Any input will be appreciated!
David
David