Holy.. didn't see 5 fish in a 20. saw chemical and chemical and skipped the rest. 5 territorial fish in a 20 gallon tank is not a good thing. That is a lot of stress you have created on top of hte stress of moving to a new home. 5 fish at once in a tank is a lot of stress. Butterflies are a very delicate fish to start. Two tangs in a 20.. ouch.. I'd suggest going a bit slower with fish additions and let us know what that chemical was that you added and bathed them in. thanks.
Troy,
The longhorned cow's don't seem to release like the other boxfish do. I agree with you that if it had in a 20 gallon it would have died as well. Cow's are pretty tough. A lot tougher than people think. My two went through some rough times that a lot of other fish wouldn't have made it through. Including run in's with a very healthy carpet anemone that wiped out a few fish with just a glance.
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Darren
Always strive for the optimum environment, not the minimum environment
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