having possible mustard algae problem 3 weeks now

[PoolDoc]

I'd recommend vacuuming up what's already on the bottom, first. Do this:

1. Your chart says you have a 2 speed pump. Put the pump on LOW speed, and run it 24/7.
2. Make sure the chlorine is STILL very high, and then brush the pool completely, to expose all the algae to chlorine.
3. Check the chlorine an hour later to make sure it's remaining high.
4. Wait 24 hours, and then vacuum up the algae. Stay on low speed. Put a towel over the main drain to block it, if you don't have a valve.
5. Continue to keep the chlorine high. Brush the pool again, if algae remains on any surfaces.
6. Let me know how it goes.


Watch the pool returns -- make sure algae is NOT going through the filter and returning to the pool. If it does, you'll need to get some DE filter powder from Lowes or Home Depot.