What is the best possible filter I can use on my 125 gallon tank...I have alligators and turtles and since their waste is so large, I was told that anything other then a submersible filter would get clogged (I dont really understand why?). Right now I have 3 HAI FENG 2100L/HR power filters in there and they are filled up with waste and debris in a couple of days. Also, the water circulates through the waste that sits in the filter and discolors my water. Someone please help me, what is the BEST filter I can use???? Thanks so much everyone.