So Im new here, but Im not new to pools. Its been about 20 years though and pools have changed a lot. We just bought a new houe that came with a pool. First order of business was to put a fence up then I took the water to get it tested at the pool store. The chlorine was super high and the CYA was 160 PPM. They suggested a drain, chlorine scrub on the walls and floor, then refill. Did that and things are currently fine. Im also replaced the cartridges in the filter because I wasn't sure when they were last cleaned or replaced and the pressure was sitting about 12, currently looking good on that front. After the refill I had to add a little bit of cya to bring it up from 20 to 30, and two bags of shock is what they had me use for the chlorine, and I am currently floating tabs.
All this while im waiting to get my TFT test kit so I can truly balance the water. Im kind of at the mercy of the pool store for another week or so. In that time my new Pentair VS 3050 Intelliflo pump will be installed replacing the 10 year old single speed (nothing wrong with it, just old and noisy, and a power hungry monster)
Any way I look forward to learning a lot more and balancing the pool my self and not spending a zillion dollars in chemicals.