My kh is near 300 My gh ( dont hAve the exact number in front of me... Maybe 75?) is low. From doing research this seems to be an unusual situation. Is this true? My pH is a little over eight, so I need to lower it. I realize to do this I need to slightly lower my KH first. Will changing my buffering capacity change the hardness or GH? Secondly, what is the best way to lower my buffering capacity just enough so that my PH can get down to around 7? These may seem like basic questions, but I've been doing research for days and have got a wide array of answers I want to hear what the experts have to say ha ha. Also is it a problem for a community tank to have water that soft?