Decidueye_

I recently set up a fully cycled 75 gallon tank with 10 serpae tetras 10 black phantom tetras 3 pearl gouramis and a pair of koi angels. I want something bottom dwelling to really complete the tank but idk what. My first thought was corys but I want something large colorful and affordable. I'm also open to non cory bottom dweller suggestions.

Would I be able to put my ziss brine shrimp hatchery in my aquarium? I don't have an extra heater for them and the ambient temp in my house is gonna make them hatch slow (ab 55°).