man I have many many BAD buys, usually and by usually I mean every recallable time, its been something that is definitely not compatible with the things ive already got crammed into my tanks, but ya know sometimes you find that dream fish and HAVE to get it right then before anyone else has a choice, I think my favorite set up was my 75 gal. with 3 gold tinefoil barbs with the words (bite, me, nemo) tattooed on the in with my common snapper, rtc, tsn, planiceps cat, e-cat, parrot fish tattooed red lips and war paint stripes, 3 lmb 4"ish, 4 red-tail cudas, and the piece de resistance the american alligator. those are my worst purchases. please dont flame or send the dnr the fish are sold dead or moved and the gator is no longer in my possession.