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    Can the difference in OTO and FAS/DPD be so big?

    First I need to give a shout out to TF Test kits. I ordered the FAS/DPD kit Thursday AFTERNOON and got it in the US mail Saturday morning...awesome service. So this morning I tested the FC, CC. I got 10.5 on the FC and probably less than 0.5 on the CC. (The CC test barely turned pink and one...
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    I need to know why :-) HTH Super Shock-it

    I have always dissolved the shock in a bucket and then poured it into the pool at the inlet so it gets well spread in the pool. I really don't like granules laying aroud on my pool liner. (21 ft round above gound pool.) My wife just bought a box of HTH Super Shock-It. The instructions for use...