Opening pool with massive algea growth

[aylad]

Yes, you definitely need to keep the chlorine high--until the green is completely cleared up and you are not losing any chlorine overnight (testing at night and again in the morning before the sun hits the pool). If you see the pressure on your filter rising, indicating that it's catching the algae going through it, then I would leave the filter running and let it do its job. If you see anything blowing back through the returns, or your filter pressure isn't rising, then I would consider turning the pump off, letting it settle, then vac to waste.

[TomDehoff]

Here are some test results from the last two days.

Evening day 1 TC 15 (didn't test CC but its been consistently at 1 ppm through this whole ordeal)
Morning day 2 TC 12.5 CC 1.0 Loss 2.5PPM during the evening.
Day 2 before adding the nightly dose; TC 5.5 CC 1.0 Loss 7 ppm throughout the day
Added 3 gals of 12.5% pool chorline
Evening Day 2 TC 23.5 CC 1.5
Morning Day 3 TC 17.5 CC 1.0 Loss 6 ppm overnight. (also had rainstorm and picked up 2" of rain during the night as well)

Pool is an in ground vinyl lined with 27,000 gals
Brushed pool last two nights and I can see a lot of debris get stirred up each time (especially in the deeper end )

Any other suggestions as to what I should be doing.