Ya, they are. I got really my parents bought it when I finished university because my common pleco had out grown my 10 gallon. (Didn't know they got so big *blush*) I've learned a lot since then but still learning tons, especially thanks to you guys. As I write this I am attempting to give my new mystery snails and baby (as in less than half an inch) bushy nosed plecos some cucumber. Found out how to prepare it here on the board 



