Hello everyone!

First time pool owner here (grew up with one, but someone did all the work!)

~17000 gallons, outside, screened.

The pool company that was looking after it did nothing but brush it once a week, add shock, and tabs. Now I've got little to no chlorine, high phosphates, CYA at 100-120+, and algae that needs brushing every few days. The local store recommends different things with the 3 different people that work there (Leslie's Pool) and I'm pretty much convinced that they don't really know what to do.

I'm currently draining the pool now (12" maybe?) and will refill. We are on a well, but I have a whole-house treatment system so I will fill from that (well water here is high in iron). The whole house system puts out pretty clean water, nearly R/O quality.

Anyway, looking forward to maintaining my own pool, getting the FC levels to where they need to be, and saving the $100 or so we spent on the pool guy to come once a week and put three tabs in a floating basket.