Shutting down my 20g and adding one of the 2 filters I had running to my 30g tank. Would like to know which filter I should keep from my 20g to put on my 30g. My 30g currently has a TopFin 60 running and I'm deciding to add either the AquaClear 50 or the Aquamaster 250. If anyone is familiar with these or has some info on them let me know which is the better choice. The AM 250 has a higher gpa and uses the biomatrix cartridges.