The bleach that Watermom recommended is to get your chlorine up for right now so that you don't add an algae bloom to the equation. Once your SWG gets up and running, it will generate the chlorine for you, but in the meantime since you don't have any stabilizer in the water, the sun will quickly degrade your chlorine.

As far as the other recommendations from Watermom and Carl, they all apply even with the SWG running--in fact, the SWG will help raise your pH as well, so it actually will make your job a little easier.

Also, you do need to add CYA to the pool, but do NOT add 3 lbs to a 6500 gallon pool. You want to check the CYA level that your SWG manual recommends, then follow CYA label directions to target just below that level, since CYA takes several days to register in the pool, and it's easy to overshoot....and if you do that, then you'll have to drain/refill to lower it. If you have a sand filter, you can put it in the skimmer but don't backwash for at least a week, or better yet, put it in an old tube sock or knee hi and hang it in front of your return to let it dissolve.

BTW, a pool full of splashing kids is a VERY efficient way to raise your pH!!

Welcome to the forum!

Janet