Originally Posted by Skyewillow
take some filter media and substrate and transplant it over to the new tank to kickstart the nitrifying bacteria.
We just got rid of our danios because they would ram into our other fish constantly, and everyone was getting pretty frazzled by it.
My danios were really little when we started the sorority. Well they are kinda big now and ram the betta when each are going for food. They have become a bit of a pain in the tank just like yours. It may be time for them to get their own place. A good way to seed kickstart a tank is with a sponge filter thats been seasoned in a cycled tank for a couple weeks, this has worked well for me.