Join Date: Aug 2011
Location: Kingston, Ontario
Here's what I would do:
5 gallon- a betta, some shrimp.
10 gallon- guppies, otos (maybe buy 1-2 more)
15 gallon- mollies, cories (buy 2-4 more depending on species)
The problem isn't filtering, it's just space. Your cories and otos are schooling, and they need more friends to feel secure. Mollies are the biggest space needers here, so they should stay in your 15gal. You'd need at least 7 tetra, which you don't really have room for right now.. :/
taking a break from fish-keeping.
3 lovely male betta still keep me company.