Purchased a home in Phoenix constructed in 1985. This is my first pool and I don't know much about pools in general or the one at this house - math using the kurtzwater.com volume calculator and a tape measure has me thinking it's about 14,000 gallons. It's appears to have a Hayward Pro-Grid D.E. filter of unknown size (~39.5" from the ground to the top so maybe a DE4820?) and a 1 HP 1.65 SF A. O. Smith Centurion pump. Prior owner left no instructions of any kind and had turned off the pump timer (thanks)! I've been running the pump a couple hours every night with the timer. I've added some chlorine (bleach) but I was wary of doing too much until I had a test kit. On sweeping the bottom I noticed something collecting there (algae?). Test results:
CH 660 (this seems way out of bounds, did the test twice)
CYA no reading (water clouded halfway between the 100 and bottom of the vial on the TF-100 test).
1. What do I need to do to bring the chemicals in line? Do I need to SLAM or should I start adding things as needed?
2. If anyone can confirm that it looks like a DE4820 or knows a way I can tell for sure, that'd be great.
3. Filter is running at 22 psi. Not sure if it needs a backwash. Downloaded the ProGrid manual so maybe I can figure it out from that.
4. I'm unsure how long the pump needs to run daily. Pointers appreciated.
5. Is that algae in the bottom? Will fixing item 1 bring everything in-line with that?
6. Anything else I should be aware of?
Edit: further research has me thinking I need to do the following:
1. Determine why the pump pressure is so high. Backwash, add D.E. (Where do I backwash to? City sewer? How much D.E. do I add)?
2. Get pH within range (muriatic acid?)