Seems like you always have issues with your tanks, might be better to focus on keeping current tanks happy and functional instead of constantly expanding. But as for your question, given your ambient temperature, a filter sounds like the way to go. Sponge filters are cheap.
That's pretty true, but I'm getting this tank just for CRS, so the majority of the problems are gone. And this time, I'm getting ADA! I've never used sponge filters before, do you just need an air pump + something like the dual sponge filter thing from amazon?
All you need for these filters are airlines/air pump/ then attach the airline into any of the sponges and it will work? I'm such a newbie.