@Watermom, yes I remember (in-fact I read the entire thread this a.m.). Here's a thought; the first dose I used I put in a 5 gallon bucket for a few hours to dissolve. Maybe I thought more was dissolved than actually was and when I put it in my pump sucked out what wasn't dissolved. That said, when I did my second application using the sock I followed the directions on the back of the HTH container and added recommended amount to raise to my target level.
Just thinking out loud.
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