I currently have a 125 gallon with 2 ac110s housing 2 tiger red oscars, 2 silver dollars, orioncensis peacock bass, hi fin achara catfish, and a clown knife...all under 8 in ...will be adding a florida spotted gar and a temensis peacock bass soon...tank will be heavily stocked i know but i wanna know whats the best cannister filter to add to my tank for the money...