My tank waters ph is 5.0 and I need to raise it. I don't know why it's so low as tap water is about 7 i don't use ro and have one piece of bog wood that has been in the tank for a while and my other tank before it. It's got a high flow and has airstones as well as the fxs nossles disturbing the water. The water parameters are 0 ammonia 0 nitrite and 10 nitrate
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