The Pool Math app asks type of pool with only plaster, vinyl or fiberglass as choices... My pool is natural concrete without plaster. Do I use the Plaster option for calculation purposes?
I thought the calculator was going to tell me what the target levels should be... I thought that plaster was different than concrete in terms of what was acceptable though.
Sorry, I am new to this and don't know what keeps it waterproof. It looks just like rough concrete with small rocks/pebbles in it. It is the same brownish/grey of the concrete pool surround but a little rockier. It came with the house and we expect it is about 20 years old.
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