I have a frog, you can still use 3 B's. The frog provides chlorine via a bac pack they call it. It's just chlorine tabs (dichlor I think) in the bac pack. These will raise your CYA over time which is why people on here reccomend against using this type of chlorine. It also has a mineral pack. You will still need to use baking soda/borax or acid to control PH.
The chlorine pacs are expensive so I stopped using them and just put pucks in there, I will be switching to SWG soon. You can run the mineral pack only and use bleach if you want for chlorination. Whether the minerals actually accomplish much of anything is anybodys guess, I think it's more marketing hype than anything.
good luck
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