hey .....
Your test is giving you mg/L
Take the 135mg/L Divide by 17.85 = 7.56dKH
or
Take the 135mg/L divide by 50 = 2.7mEq/L x2.8 = 7.56dKH
the first one is the best, only one step(tripped on it one day while reading)
hows that

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Richard
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My wife believed me when I told her it was only going to cost about $500.00. that was over two years ago and I'm still grounded.....