OK everybody.. lets not get on the soap box with the whole goniopora coral freakshow!!!...
now.. sounds like your flowerpot has brown jelly desease... you can stop this by dipping it in a reef dip/iodine solution from seachem... this seems to stop it dead.. then return it to the tank with med/high current.. this should stop it...
I have had SEVERAL experiences with flowerpots... bad and good, after extensive research for years into this subject of why these corals just seem to just die in our captive reefs I, as well as julian sprung, have concluded though.. of course extensive research and observations that these corals need to have a diet of phytoplankton to survive in captivity.. in the wild these corals are found on lagoonal type reefs that are absolutly covered in phytoplankton masses... so much the water is often green.... these corals seem to love this very rich diet of phytoplankton and a bit of zooplankton too.... Julian Sprung conducted several "gut" analasis of different WILD colonys of the species GONIOPORA and concluded through every gut analasis that these corals feed primarily off phytoplankton... there was very little zooplankton in their guts...
I have found that the people who do have these corals and are able to keep them have done so in very matural tanks with a ton of LR and most of the time with refugiums.... I know of a man that has a 300gallon tank, of course with a refugium, that can and has for some many years kept things in his tank alive that no one has ever attempted, from flame scallops, to different colors of goniopora and alveopora to even linkia stars and fromia stars... now he is trying a morish idol....
this is just 1 of many people I know that have successfully kept these wonderful corals.... I myself have and am continueing to keep these corals..yes I have a fuge and yes I add DT's LIVE MARINE PHYTOPLANKTON like NOBODYS business!!!... lol, I have fraged my alveopora twice and have a red goniopora, which at the moment is very ticked off because of the other nearby corals... and also the very hard to keep green goniopora... I spot feed these corals every once and a while (*1 time a month or two*), and they seem to love it.. the next day you can see these little dark dots in their tenticles where they have eatten it... I feed them Phytoplankton mainly... occationally I have put cyclop into the tank... but they dont seem to like it... so I have backed off on that... I think if people would experiment with there reefs by purchasing 1 flowerpot coral that is in very good health... and do DTS LIVE MARINE PHYTOPLANKTON twice weekly they will be able to keep these wonderful corals... I have kept these corals in less than perfect water quality.. with trates up to 40ppm and not the exact ideal pH nor Alk or Ca.. so they are obveously tollerant of many water conditions... the water quality in my tank now is perfect... 0 everything.. they still seem to love it.. and I do NOT skim... I personally think that this takes too much out of the reef that is good... but if you DO NOT have a refugium than yes I recommend skimming!
I hope this helps... once again this is just research that I have done... maybe you should do you own!
good luck!
My flowerpot seems to be growing new little tentacles on its base. Do you think this is a sign that it will flourish in my tank, or do they all have new growth, even when slowly dying?
possibly... no i do not think it is dieing if it is growing new tentacles... go buy some DT's and triple the dosage and add this to your tank twice weekly.. remember that this is LIVE MARINE PHYTOPLANKTON so it is not bad for your water quality!
try this and you will see a serious improvement!!!
goodluck!