This past week i have done about 150 gallons in water changes.. my Ammonia levels have been at 6 ppm and today i checked its down to 4 i bought a amminoa pad and put it into the fx5 i have running on my 210. i have 2 aro's 2 pbass and a alligator gar i feed about 2-3 times a week recently on market shrimp. i have been putting neutral reg in there no success on raising the ph although i know if that goes up the ammonia in the tank will harm the fish more than now. i also bought turbo start 2 bottles which treats up to 300 gallons no success really. Today i went and the LFS guy told me to wash out the filter with RO/ water with prime in it and i wanted input from you guys before i touched anything. i have bio balls running in each basket.