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All depends on size of the fish. Rule of thumb is 1 inch per gallon with smaller fish. However if you had a 20" fish, obviously 20 gallons is not enough. What kind of fish are you planning on adding?
All depends on size of the fish. Rule of thumb is 1 inch per gallon with smaller fish. However if you had a 20" fish, obviously 20 gallons is not enough. What kind of fish are you planning on adding?
I would consider rehoming those fish....especially if they are only in a 20 gallon. Oscars can grow a good inch per month, and require HUGE tanks. You could keep 1 oscar in a 55, but not 3.
I would take all 3 of the oscars back and get those parrots into a 55 as soon as possible. You could probably add a few more smaller cichlids to a 55 with 2 parrots, but thats about it.