the intex swg is pretty strong, and you shouldn;t need to run it that long once your pool is cleared. For now it's just fighting the algae, but can;t keep up...I would shut it off and shock with bleach.
1st step, I know its kind of expensive, but strips just plain and simple do not work...please do yourself a favor and invest in a test kit recommended in pool school. We find the tf100 at tftestkits.net to be the best value. Armed with such kit, you will ensure your water is safe for the girls to swim in...I have 4 runtlings myself and it gives me piece of mind.
Read pool shool...you need to shock your pool with just plain old bleach...shock is something you do to your water by adding chlorine...you don;t buy shock...it's just marketing.
Walmart 182oz jugs of great value unscented bleach is one of the best values at $2.54 a jug...your fighting an algae bloom...so you'll need to read the how to on shocking your pool.
Order the test kit asap..and while your waiting you can dump 1 182oz jug of bleach in the morning and 1 jug tomorrow night..then the next day same routine except 3/4 in am and 3/4 jug in evening.....before you do this on day 2...collect a sample and ask your local pool store to test the water...and ask for the results...post them here and well tell you what you need...do not buy any chemicals from the pool store until you ask us for advice..I'm guessing the chlorine/bleach dosage based on your pool volume and being somewhat aggressive since we are not sure of you CYA level. Once you get a good test kit (TF100 ot taylor k2006)...post water results here and we will fine tune from there.
The bad news...don;t let the kids swim until were done shocking and we are sure the water is safe. Good luck...feel free to buy at least 10 jugs of the bleach...just make sure it is the unscented kind....clorox will do just fine as well...just a little pricier
Good luck and welcome to TFP