03-28-2008, 07:33 AM
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check you gH and pH of the water your filling you tank with. If your gh is high, then buffering your pH lower will be difficult. If it's low, then lowering your pH won't be bad. You can buy over the counter pH reducers, but as I stated if you general hardness is high, you'll just be getting head aches.
If all else fails, you can buy purified water and starting during water changes with that and it will steadily fall.
Plus, what's in your tank? Some decor like rocks will raise your pH. If you have live plants, adding a C02 system can help lower it.