ONLY if you are going with saltwater or an African cichlid tank. Otherwise, they'll jack the pH up too high for other FW fish, including the blue rams or green terrors...Dorkhedeos said:oh yeah, he wants to use these shells and bits of dead coral and other stuff that were in the tank because he said they were natural. i was thinking that sand would look better, but he says sand is too plain. do you think these shells would be ok?
Maybe try a green or gold Severum. They're a little of the best of both worlds. Nice big fish but aren't TOO mean so you could develop a good community in there with the right tank mates.
If *I* had a spare 75 around, I'd definitely turn it into a saltwater tank!