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Hi,

I changed my substrate and went with coral sand yesterday to raise/ control my ph rather than use chemicals.

24hrs later my ph is at 7.4.

Is this normal? How long does it take to raise ph? My tap water is 6.0ph. My kh is 9 degrees in the tank. Whats keeping this down?
 

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I don't find the substrate raises pH at all. Some report that when you start with a very low pH it works better.
 
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