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  1. R

    CH Level

    Is the TF-100 CH test accurate when the CH is at a low level? The instruction says, I think, that when CH is low, divide the number in half - is this right? I thought that my water was soft - I've tested it with 2 local Leslie's and the results were both on the low side, like 180, but the...
  2. R

    Skimmer flap/weir

    It looks like my skimmer's suction isn't getting the surface dust into the filter. I'm thinking of putting in a skimmer flap/weir to help. Is there a particular brand that's better or any tip you have on this?