Do not add buffers hehe, i just had 10 fish die due to adding buffers, One thing that seems to work is taking a small filter bag and putting about a cup of crushed coral into you filter, If you wait another day i will let you know exactly how it works out for me, my PH was at 6.2 2 days ago and its up to 7.2 no, The problem i have is that it fluctuates, by . 5 or so. I will let you know tomorrow what happens.