Just FWIW, a friend of mine recently bought the $20 HTH kit in the process of trying to clear up her messed-up pool (an Intex filled with well water) and after taking my PS 234 over to test her water, I repeated it all with her new 6-way, and all the results were the same--so it appears that this is the same 6-way they had before, just without the blue plastic storage box. And the OTO block on hers reads to 5 ppm.
Janet
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