I went to a couple of FS in madison over the weekend, and was very disturbed to find a very very large pleco (over 18") curled up in a 30 gal tank, it looked like it couldnt even turn around in the tank. Its head was buried under a piece of drift wood in the very front of the tank, and its tail swept around the side of the tank, and settled almost parrell with its head. (if you dont understand taht his body made a complete U shape in the tank) I wanted to get him out of there, i asked teh kid working why he was in such a small tank and he said that it was the right size for him. I think bull****! I wish i had a tank to put him in. Very pretty sailfin.