I bought new testing supplies for this year but I am wondering if the DPD powder from last summer is still good. Hoping to not need to SLAM my pool this summer but just in case I need to, I thought it would be nice to have the extra powder around to use if I ran out of the new stuff. What about the rest of the supplies, is any of it worth keeping? Today was my first after winter opening and I have a quick question- if my cc was 0 and my water clear, do I need to still do an overnight test or is it safe to assume my pool is algae free? Thanks!
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