Been like 6 months since my ph been low , can't find the problem , I'm hoping someone can give me some help , so I have a bare bottom 125 gallon tank , ph is at 6 , my tap is at around 6.5 , I have two full bags of crush corals in my filter , and one large pc in my tank , I know adding more will help but I hate the way it looks in the tank , am keeping arowanas , ph 6.5-6.8 would be good but this problem been making my head hurt , lfs store said he doesn't know the problem also , help please , any tip will help , thanks , btw will testing the gh and kh help? Thanks again
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