okay, i have had a tank for 4 years and i had two pacu, i moved to an apartment and my room mate literally froze on of my fish to death (long story) so i have moved back home and to other pacu did not take to the move that great and he ended up dying shortly after. So now i am trying to set up my 55 gal for a community tank. i have never been able to keep any other fish w the pacu because they would eat anything that went in (even an oscar their own size) they were awsome fish and so bug, but i am ready for a change but i dont know anything about community tanks. i thought i knew enough about other fish but apparently not. i introduced several fish in two days ago but all i have left living are two garoumis sp? they are doing really well and love the tank. (it is awsome looking, i have never been able to have many plants because the pacu ate them so i decked it out w an atlantis theme hee hee) so i would really appreciate some ideas on fish that would occupy the entire tank bottom middle and top, and hopefully live. i have well water and i think it is more acidic and alkaline than most fish can bear, so i need fish who arent really sensitive. i appreciate any help and suggestions thanks!!