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Lf calibration fluid for ph prob
As it says
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The Manuel says to use a ph of 7.0 and 10.0 to calibrate I'm new to the apex so not sure if it would work but thank u for the reply
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Most stores carry the 7 & 10 calibration solutions for only a couple bucks. If you have a ph test kit you could make your own solutions but its a pita.
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Or better yet go to a hydroponic store and grab a bottle of each fluid for under $5/bottle. Much cheaper than the one use packages they sell at LFS
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Now that I no most lfs carry the powders ill pick some up thanks
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I've never seen a powder, I've only seen it in little bottles or foil packets.
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