Planted Tank Guru
Join Date: Dec 2017
Location: Elk Grove, California
Depends on what kind of fish you are interested in breeding and how many fish you intend to raise. For instance, if you are breeding ram cichlids and want multiple spawns and fry growing at one time, you would need some ten gallons for pairs, some 5's for newly hatched fry, and some 20's-30 gallon ( depending on amount) to grow them out further.
Now, if you were raising larger cichlids like discus, for instance, you would need 30-40 gallons to keep each pair. 20-30 gallons to raise fry up to about 4 inches ( depending on amount of fry), and 55-75 gallons for sub-adults to adults. Depends on when you want to sell these offspring, at young 2-3 inch, 4 inch, 5 inch, Adults, etc...
I would first decide what you want to breed and how much time you have to devote to it-- this will let you know what size tanks to get and how many.
Edit: I would also advise going to your local aquarium society meetings and talking to fish breeders, they will give you excellent ideas on breeding that you are unlikely to find on a Planted aquarium forum. Ask to see their fish rooms, this will give you ideas on how these--- small-large-- operations are done.
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