If I were going to drink water from a 1,500 gallon storage tank as you do, I am sure I would want to treat it in some way before drinking. Just not comfortable with the chlorine. There are other options available.
How long do you store this water before use?
Actually we have two or three (not all in use at the moment) plastic ones, food grade, and one stainless steel tank (previously a milk storage tank, well cleaned!). We use the s.s. one for drinking and cooking water, and generally use a Berkefeld water filter anyway, especially when we’re at the tail end of the water. The well water is good as is, but we don’t trust 250 plus feet of pipe, and we don’t like water stored in plastic either.
I really like Berkfelds, it takes forever for the filters to get used up - never have, actually, just had to replace one that I dropped.
I’d like to have a cement cistern but if wishes were horses, beggars would ride.
Oops - just saw this question. We constantly use water so pump containers pretty often; the s.s. drinking one much less often.