Has anyone used Seachem Acid buffer? The water out of the tap here has a PH of 7.6 and I would like to get it lower (around 6.6 - 6.8) to make most of my fish (rams, neon, rasboras, cories) happier. I asked my lFS about using RO water to reduce ph and they recommended Acid Buffer. I have read alot of postings where people talk about not add chemicals to treat water but this stuff is much cheaper than buying RO water.