I have 3 female bettas living happily together in a 5 gallon tank. I have always intended to get them something bigger. Today, their filter has started to act funny, and the little bio wheel doesn't want to spin around like it should. Since this is a 5 gallon hex from Walmart, I can't just run out and get a new filter system for it as it won't work properly and won't fit in the hood.

Can I add these 3 gals in a tank with neon, berry and glo tetras? There are danios in there as well. Would they be okay with rummy nose? I want to switch them tonight if I can as I don't want them in a tank without a filter. I could add them to the angel fish tank, but I don't think they will be compatible with them. My livebearer tank is out of the question, as I feel they would be too crowded in there. The only other tank I have is a fry tank which currently has fry in it. All the other tanks have something in them, and I don't want to overcrowd the tanks.
Also, can the 2 snails live in a tank with a pleco and cory fishies? Or would they be better of in the guppy fry tank with the 3 otocinc things. I don't imagine the babies create enough algae to keep the 3 otos and 2 snails going. I could keep them with just a bubbler and no filter I guess. But how would the algae be created if there are no fish in there? <<feeling really dumb here>>