I'd say something, but it seems as if everyone has mentioned what you need to do. Do be careful when buying Plecastami, because some do get
huge! My roomate didn't know this and bought 2 that got up to about 10" apiece, in a 29 galon tank. They were eating 2 sliced cucumbers a week (man that was funny to watch) before he donated them to the local aquarium store.
Other fish I've had and recommend:
Congo Tetras--quite possibly the most beautiful freshwater fish I've ever kept. My aquarium guy said that they can be somewhat territorial, but I didn't have any problems with them in my mixed tank, but YMMV. Make sure you buy chemicals (tannin, especially) to bring out their colors, otherwise they just look silver.
Glass Cats--beautiful transparent fish that get along with anything. If you get several, they'll school near moving water in your tank. Very resilient fish, too.
Clown Loaches--will eat anything. They can get big too!
Khuli(sp?) Loaches--one of my favorites. Cool worm--looking loaches with a tiger-stripe pattern that like to hide. If you get some, you should probably get something for them to hide in, like a Ghost house or tube.
Cory Cats--these come in so many different varieties. Very docile, as are most bottom feeders. I like the albinos, personally.
Neon Tetras--very fragile, but a school of them can bring together a tank.
And finally, this one fish I can't think of the name of. It's silver near the snout, which gradually fades into a bright bright yellow at the tail. It is a top feeder, with a flat head. Lovely fish, I wish I could remember the name.
Some fish to avoid:
Tiger Barbs and Danios. They can be very territorial, and rip your other fish's fins to shreds.
Live plants and grass shrimp are wonderful additions to any tank, also. I personally like Java Moss (and so do the shrimp), but you must prune it, or it will take over your tank. As you can see from my recommendation, I like bottom-feeding fish. IMO, they're the secret to a clean, successful tank, but of course, a tank doesn't look good unless you have top feeders, swimmers/schoolers, and bottom feeders. Have fun with your new hobby!
