Again, I agree with Duane, a 75 gallon is far better suited to something along the lines of a pair of HRP's, than a larger species, such as P. polleni. I have kept both, and male P. polleni get relatively large - Duane can post pics of some of his adult males. Not as large as some O's, but still a large fish, that produces a large amount of waste. FYI - robham, your pollini appears to be a female, so should be fine for life in a 75 gallon. I would personally not recommend male pollini for a tank with a 48x18" footprint, but maybe that's just me.
Sarah - are you stuck on cichlids? If not, there are other fish that can be very personable, more of a wet pet personality, that don't get uber large, and might work for you if they suit your taste. On the top of my list for personable smaller fish, are some of the puffer species. Just thought that I would toss that out there. http://www.seriouslyfish.com/species/tetraodon-nigroviridis/
Sarah - are you stuck on cichlids? If not, there are other fish that can be very personable, more of a wet pet personality, that don't get uber large, and might work for you if they suit your taste. On the top of my list for personable smaller fish, are some of the puffer species. Just thought that I would toss that out there. http://www.seriouslyfish.com/species/tetraodon-nigroviridis/

