Hi,

I'm sounding like a stuck record today.....I would use a large dose of Cl. You don't say the size of your pool, but it still sounds like your Cl is being consumed by something other than sunlight. Based on your general description of your Cl application, it sounds like you've stopped short before you got out all the algae.

Bring your Cl all the way up to about 15ppm and then keep returning it to that number for the next few days. That means you must check more than once each day. I think you'll have clear water after that. It's also a cheap fix.....then you can look at DE or another issue if that fails.