also, snotirl, i just finished reading your sig. i'd like to say, even though i believe overstocking to be something done to newbie tanks and pet store tanks, yours are quite bad.
Tank 5 gallon
2 silver mollies
1 pleco
3 neon tetras
1 Red tailedshark
2 african clawed frogs
2 Gourami's
the mollies and tetras are fine, but the pleco and shark will get big, the frogs and gouramis will get aggressive. i suggest returning them to the store or selling them and replacing them with a pair of corydoras.
Tank 15 gallon
1 Pleco
2 clown loaches one albino cory
1 male and female swordtail
1 sisemase fighter.
the pleco will get large, almost a foot long, as will the loaches. and the cory desperately needs a pal. return the plec and loaches and replace them with two more cories, also the male swordtail will exhaust the female when he wants to breed. as a general livebearer rule it's two females to a male.
Tank 50gallons cold water tank
1 comet
1 blue oraf
1 koi
7 goldfish
1 schubkin
the comet and schubkin are fine, i'm not sure was an oraf is, but the goldfish and koi are pond fishies. they belong in a great big pond where they can roam around. but if that's working fine leave it, it seems like a nice setup
this is JUST my opinion, please nobody snap at me, i'm just pointing out some things -hides-.