I think Carl is trying to communicate this:

==> You need to KILL the algae, BEFORE you worry about anything else! <==


As he's pointed out, we need other info, to give more specific advice, info that you are finding it difficult to supply.

I'll suggest an alternative approach:

1. Tomorrow night, REMOVE your cartridge or "filter sock" (??), replace the lid, and then turn the pump back on. THEN, add 2 gallons of PLAIN 8% household bleach for each 10,000 gallons of water in your pool.

2. The following day, if the algae is ALL dead, add 1 gallon of bleach per 10k gallons, brush the pool, and test the water with a cheapo OTO / phenol red kit. If the algae is MOSTLY dead, repeat the dose. If the algae is NOT mostly dead, add a 3 gallon dose.

3. The third day, if the algae is ALL dead, add 1 gallon of bleach per 10k gallons, brush the pool, and test the water with a cheapo OTO / phenol red kit. If the algae is MOSTLY dead, repeat the 3 gallon dose. If the algae is NOT mostly dead, add a 4 gallon dose.

4. Keep walking the dose up, each evening until the algae is dead. THEN, we can worry about filtering and such.