plecos and other fish

Except for the monstrous shipping costs. Its usually at least $30 shipping per order. If you get them off Aquabid.com shipping is sometimes negotiable since you're mostly dealing with people not companies.
 
I think they would work in that size, both those plecos must have a lot of driftwood in the tank to survive. I learned the hardway with a peppermint pleco. I had driftwood, but not enough. Now I have a 3x1 foot peice in my 55 that my gold nugget is always on, I rarely see him on the glass or anywhere else. They also love it if you cut a cucumber in half, microwave it in a wet paper towel for 20 secs, weigh it down and drop it in.
 
AquariaCentral.com