Discus For 55g Tank

Assuming its cycled, and they are the only aggressive fish in there, maybe 4-6 depending on how many water changes you do.
 

do try to get a grip LOL

personally in 55us gal I would go for 5-6 adults, with a few other fish like cardinals & corys.

Tank MUST be well matured with NO ammonia or nitrite
 

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