You'll get a lot better advice than mine, but this might help for starters.

First, get your ph up to 7.2 at least, but probably not too high if you have yellow mustard algae. Then, you are not using nearly enough bleach. You need to get it up to shock level, probably 15ppm or higher and maintain it for a couple of days.

Better testing methods are needed to monitor this, and you'll probably need to add bleach more than once a day. And you should test your CYA to really know how much bleach you need to kill it off.

Once you get the chlorine up, you'll know when it is effective. The water will start looking nice again, and your chlorine consumption should go down. Keep brushing and vacuuming, preferably to waste.

It really does work!

Jim