...sort of correct in a wierd sort of way....anyway a hydro5 is a foam filter that you can look up on ebay and buy fairly cheaply. it attaches to a small power head or it can be driven by an air stone.
Your tanks dirty because...
1) you dont have enough filtration. (without the water pressure of a full tank most HOB units limp along at a fraction of their rated capacity.)
2) your tank's filter hasnt had enough time to 'cycle' so that it can break down the fish waste.
3) You need to leave the filter media alone and do more water changes.
NOTE: once you replace the hang on back filter with a proper cannister you'll have to start this WHOLE PROCESS over again.
Your tanks dirty because...
1) you dont have enough filtration. (without the water pressure of a full tank most HOB units limp along at a fraction of their rated capacity.)
2) your tank's filter hasnt had enough time to 'cycle' so that it can break down the fish waste.
3) You need to leave the filter media alone and do more water changes.
NOTE: once you replace the hang on back filter with a proper cannister you'll have to start this WHOLE PROCESS over again.