Bubbler

Nope, not at all. SO long as you have good oxygen exchange in your tank (powerheads, filters moving/oxygenating water) you should have enough. Skimmers are a big help too.

FWIW, if this is about my suggestion yesterday to try a bubbler. That was more a test to see if you had low oxygen in your tank. To see if that was what was stressing your fish out. :)
 
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