i have a 55gal with sand, a few smooth round rocks, and a 12" x 12" piece of malaysian driftwood. ph is almost 8.0. i'm hesitant to use powders (buffers?) to lower ph to about 7.0. i believe my tap water is 7.6. should i use more driftwood? peat granules in my fx5? are powders safe to use? what is the cheapest wood to use? i never messed with ph before and i want to make sure i do it right to prevent any fish loss. can anyone PLEASE help me? pretty please with ice cream on top?