Right now I'm running a 75 gal tank and I have a 2 1/2 gal tank under it in the oak cabinet that I used for the baby guppies. I was also going to keep it as a sick tank. It's got some small java fern and a bit of anacharis in it. Anyway, now that the guppies are big enough for the big tank, what should I do with the little one? I have to keep it running, right? Seems like a waste but I don't want to dump it out and start over when my endlers or platy gets knocked up. Any suggestions?