My RTM have fattened up and coloured up a lot and started to build a nest at the other end of the aquarium. so I'll assume there getting ready to spawn, there now eating 4 herring a day and two blood worm cubes each. That are in a what I believe is a 70 gallon aquarium, I'm looking to trade them for a larger aquarium to house my other predatory fish. These two breed way to often for me which means much much more work. I don't mind once and a while and selling the fry but every month like clock work is to much. I'll sell this batch off and if they spawn as soon as I think. I'll finish that batch and let them go as soon as the fry are free swimming