Since getting a CEO from BioLab, Arch / HTH has been adding more and more goop to their products. They use a number of different "inert ingredients" to dilute with.
I have EPA label and registration data, plus MSDS sheets, on some, but not all, Arch products and with those I can probably tell what's in your tabs. BUT, to even look, I need the EXACT product name from the label.
For what it's worth, plain undiluted cal hypo skimmer tabs, used with a sand or DE filter will commonly produced very, very clear water. Unfortunately, those tabs are hard to find.
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