would a 72 gallon work for the festae , it is currently empty but still running and cycled ,i know u said 20g max , i could divide the 72 to make it smaller,sorry to ask but why low temperature for the festae
sorry to disrespect and correct u jason but he said clout for the festaethis was unnecessary sure he's been a bit slow to react but at least he is trying a little.
I'll leave my last advice for you
For your festae with the bad slice in his side, he or she needs to be alone in a smaller tank, 10-20 gallons max, over a week slowly lower the temp to about 75 and start treating for bacterial infections with clout. keep feeding the festae with higher protein foods, live if possible but not live fish. watch your festae really closely. and if you want you can also treat it with epsom salt.
Now your ornatum, It NEEDS TO BE ALONE. put it in its own tank, its size will be fine in a 10g tank for a few weeks, treat with epsom salt but in water and with a needle, treat according to RD's recommendation. also Treat with metro, both in water and with a needle, if you can't get metro walmart has jungle meds, check and make sure it has metro in it and use that. keep temps over 86, not bellow, you can even go to 88-89 to make sure it isnt bellow 86. BE VERY GENTLE WITH THIS FISH!!!
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And remember Water change daily and refill with epsom treated water. If you don't have 10g tanks go get some =p if possible