Things have drastically changed pumps were single speed and now required by law (title 20)

to be a minimum of 2 speed for filtration. Why is it important to pick variable speed instead of 2 speed? In the pool sweep section you will find more details how you can remove your secondary pool sweep pump (if you have 1-1/2 inch pipe & low flow pool sweep).

The filter section will cover the difference between paper filters, sand filters (and different media) and outdated D.E. filters.

Heaters are good for hot tubs but solar will definitely extend your season by a month or two before and after season would end for other pool owners.

Automation can be as simple from Intermatic mechanical timers to now uses Alexa or google home.