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· snails are your friend
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Welcome to TPT. I always have to convert PPM, but I think you're in a pretty good spot. 40 ppm = a little over 2 dKH and 7.2 dGH which is right about where my tap is and I do great with them. I wouldn't change a thing. And as an added bonus if your source water is consistent, water changes will require no altering.
 

· snails are your friend
Joined
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3,092 Posts
I didn't see the use of a buffering substrate? At any rate sub 2.5 KH won't wear it out too quickly, though GH only RO would be ideal if OP is indeed using aqua soil.
 
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