OK, I scrolled back to find your gallons -- 5,000. So, a gallon of bleach in your pool is about 12 ppm.

Verify with a cheap OTO kit -- turns yellow to brown with chlorine and will NOT bleach out with high chlorine -- that your chlorine is LOW and not HIGH.

Once you've done so, start by adding 1 - 2 quart (3 - 6 ppm) doses every hour till you get a chlorine reading. If you add 3 doses and still no chlorine, start adding gallons.

But be SURE to use OTO to test, so you will show high chlorine if it goes high! Other test methods can read zero when it's really high, due to bleaching.

Green pools (from algae) are no fun to clean up, but I'm not sure what's going on in your pool. Normally, in a vinyl pool, any sort of algal growth will be accompanied by (and usually, preceded by) a biofilm on the liner. You can detect this as a slimy feel to the liner. As long as that slime is there, you're not done with the algae.

I see discussion of various sequestrants and stuff. Many, many 'pool chemicals' are not really chlorine compatible. Some will consume chlorine like crazy. But without knowing EXACTLY what you've put in, I can only guess. It's really hard to clean up a pool with metals AND algae AND unknown chemical soup.

But, ya gotta keep chlorine in the pool, or stuff will grow.

Ben
"PoolDoc"