You also don't want to exceed oxygen requirements, which will be your first limiting factor. Then comes ammonia and nitrites. That is unless your tank is a flow through tank.
Your amount of ammonia and nitrites your tank can handle are based on on your biofilter capacity and your ability to remove solids.
That said, I would not think you would need anywhere near the capacity of a biofilter for a 200 gallon tank to produce offspring.
Do newly hatched fatheads readily accept artificial feed or do thy need zooplankton for a period of time? If it's the latter you will have issues with high mortality if you don't offer any zooplankton.
Last edited by Cecil Baird1; 04/11/14 09:36 PM.
