I’m in the process of setting up a couple aquariums for breeding the tilapia… I think I’m going to put 2 olive trees in the top aquarium, where there is space to let them grow ( that room has a vaulted ceiling) In the back corners ( 65 gallon on the bottom, 45 gallon on top) both with just sponge filters to start… both will have other house plants as part of the filtering… I may need to hang a hang on tank filter on the aquarium that houses the breeder fish during non breeding times