Hi all, I have a 125g fowlrls and am having trouble with the PH. The tank has been set up for 8 weeks, and has cycled already. I have 6 black mollies in there, with a Snowflake eel. I put an Amircle skimmer in after the cycle. Now my Ph keeps rising, 8.3-8.6. I am using Seachem Marine Buffer...