i have a 20 gallon tall filled with saltwater 1.021 i think. i am using crushed coral as substrate. i have 5 lbs of live rock for now. i have a 100 watt hydor heater and sometype of hang on skimmer i also have 2 maxijet 900. what im leading up to is my extremely low drop in PH it goes from perfect at 8.3 the nxt day its 7.7! I,ve been using seachem reef bufer almost every day and that gets tiresome. is there an other product on the market that can automatically bufer my water ?? what step would you take to resolve the issue??? thank you in advance