Well, I did plan on moving the frog to his own tank once he got bigger (I'm sure he'd make a meal out of them fish). I guess this could just speed up the process. I guess I could move him to the 10 gallon and move the plecos to the 20 gallon and go from there. If I'm able to get what I need on Thursday, that should help immensely. A shame the gravel isn't a suitable substrate - I'm quite fond of gravel... How does aquarium sand work exactly? I can only picture it being stirred up really easy and clogging the filter and just being a big mess.
Also, this could also be an issue, and I'm embarrassed to admit it, but what do you all use for surface agitation for your frogs? I read that air stones and similar things aren't good for the frogs, so I don't have one in the tank, but consequently the surface of the water looks absolutely disgusting.