my ph has been hovering around 6.4 or so, with diy co2

I keep tap water treated with stress coat and florapride in gallon jugs, ready for use... just tested that for ph, and it was similar at around 6.4

Are you saying that your water directly from the tap is 7, and it is 6.4 after sitting but before CO2? If this is the case, then 6.4 is the natural pH of your tap water and your DIY CO2 is ineffective.
 
mine is virtually the same.. 7.2 out of the tap, 6.6 settled, and 6.4 with co2. youre just fine. :)
 
Are you saying that your water directly from the tap is 7, and it is 6.4 after sitting but before CO2? If this is the case, then 6.4 is the natural pH of your tap water and your DIY CO2 is ineffective.

wow i so missed that part. good save canuck.

Rex Grigg is right. if the settled tap water ph is just 6.4 and your take is 6.4 there isnt any co2 getting dissolved into the tank.

try looking for leaks. also take the end of the tubing put it in some water to see if any co2 is coming out.
 
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