Sorry, I'm buzzing through a bunch of posts and threads, and didn't finish yours.

To get rid of algae, you have to kill it first. To kill it you have to add enough chlorine. So, do this:

1. Start adding 4 gallons of PLAIN 6% bleach LATE each evening.
2. Add bleach and then brush immediately after the 2nd dose
3. Run your pump 24/7; only backwash when the filter pressure is up at least 4 psi over the clean pressure.
4. Continue dosing in this manner until the algae has all turned gray or brown.
5. Dose 1x after that happens; then turn pump off overnight and see if the algae will settle.
6. Maintain dark yellow to orangish yellow chlorine levels for several days after.

Let us know how it goes, so we can suggest modifications as needed. No floccing yet!