Minumum tank size for a Koran angel is well over 100 gallons. Your tank is suitable for only dwarf angel species, which includes all of the remaining choices you listed. All are good for captivity, so its just a matter of chosing which you like best.
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I retired and got a fixed income but it's broke.
Ed
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50 gallon FOWLR, 10 gallon sump.
130 gallon reef, 20 gallon sump, 10 gallon refugium.
10 gallon quarantine.
60 gallon winter tank for pond fish.
300 gallon pond with waterfall.
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