Drain very green pool?

It's pretty green. Here's a picture.
Ok, so here are the before and after. The water is balanced now, except I'm keeping the chlorine a bit high to fight the black algae (Which was there last year and survived the freeze!). Thanks all for the advice.
 

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So, how long was this SLAM process, 26 days or so?? And do you have a count of how many jugs of Liquid Chlorine??

Just asking for grins and giggles

Maddie :flower:
I slammed it for about 3 weeks, then started in on the black algae. Total chlorine is about 21 gallons so far (including what I'm still using to keep the level up for the black algae. Something I noticed was that, since I had to backwash all the time for the first 2 weeks at least, I was losing a lot of stabilizer (and was probably a bit low to begin with, I began all this out of CYA chemical R-013). So I used a lot of chlorine I might not have if I had higher stabilizer levels.
 
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