While I agree that having an understanding of the relationship between the different parameters we test for, I belivestability far outweighs ahving the number bang on. My alk has been as low as 3 and 4 for the longest time. Fearing an apocalypse of my own, I starting raising it slowly. Once I finally had my ALK up to 8, everything starting to burn, bleach and generally show me they were unhappy. So, I let it get back down to 4 or 5 and everything is happy again. I believe it is the large swings in parameters that create a problem.
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