Be CERTAIN you put the filter on RECIRCULATE; do NOT let the algae go through the sand filter! Let me known when you have the OTO kit, and what the results are.

The clean up will need to go in two stages:
+ First, you need to kill all the algae, by getting the chlorine high enough so that the water goes from greenish, to cloudy blue. After that happens, you'll need to re-dose with bleach and then brush the pool, to stir up algae on the bottom.
+ Second, you'll need to remove the algae. It won't filter with the sort of undersized sand filter matched with an oversized pump! You'll need to vacuum to waste.

Questions:
1. Do you have any of those chemicals left? If so, do NOT use them; use bleach instead
2. Do you have a manual vacuum set -- head, pole, hose long enough to reach the middle of the pool AND hang down to the ground at the same time.
3. Verify that your filter valve has a RECIRCULATE and a WASTE position.
4. Do you have a valve between the pump and the filter, that wold allow you to throttle flow? Do you have a valve downstream of the filter?

KEY POINTS:
1. Do NOT run the algae laden water through the filter; doing so will make things worse.
2. Do NOT let the chlorine level go below DARK YELLOW on the OTO kit; you'll need to get it up in to the "ORANGE" range (not shown on the kit!)
3. Add a box of 20 Mule Team Borax for good measure; low pH can hurt your pool; high pH under these circumstances is preferable.