1--if I have the Aiper Scuba S1 Pro that scrubs floor/walls/waterline, will I still need to brush and or purchase a skimmer vacuum? Also using a Betta SE and skimmer socks to keep filters clean longer.
I would still run a brush once a week.
2--I seem to have gathered that I should test FC, salinity and pH every few days at least during the warm season. Test the rest every week or so?
The article below is a good starting point. The more you test when new, the more you come familiar with the needs of your pool. These may vary a bit from the article, but work for me...
Test FC daily and pH daily until you're confident enough to stretch that out to every two to three days.
Test TA
daily weekly unless you're trying to lower the level through aeration/pH.
Test CH, CYA, Salt monthly unless you see signs of your levels being off (warning lights on SWG, sudden increase in FC demand etc)
This basic pool care schedule can guide you in creating your own pool care routine. Regular pool maintenance will keep your water sparkling!
www.troublefreepool.com
3--check salt cell periodically for calcium
Good plan. If you maintain lower TA levels with CSI between 0.0 to -0.30, you'll probably not see any.
4--Adjust pump run time and SWCG setting to keep FC where I want it
Yep..or SWG percentage
5--Keep filters checked and set the dial to clean matching the needle next time I thoughly clean them.
Filters should be cleaned/backwashed when pressure increases 25% over clean level. Reading should be taken at same pump speed with valves set the same way.
6--I don't ever close my pool so I'm guessing I'll need to monitor/treat less frequently?
I don't close here either. Off-season, FC demand and evaporation decrease which keeps chemistry more stable. Your SWG will shut down when water temps drop to the low 50's. Be ready to deal with this when it happens. Use liquid chlorine. If your levels allow it, you can float trichlor tablets to help out.