"Thanks so much in advance! BTW, the 5.5 gallons of bleach I poured in has had zero effect.."

Wrong! It HAS had an effect, even if the effect is burning up some stuff that would otherwise have used up the NEXT dose.

Oxidizing pool debris is like burning leaves: if you burn up a wheelbarrow load, you've burned those up, regardless of whether that was the only load, or just the first of ten!.

You should be adding 5 - 6 gallons EVERY evening, and testing with OTO an hour after, and again in the morning. Do this till your chlorine level in the AM is unchanged from the evening before.

Do not test your pH when the chlorine is above 5 (so, test in the PM before you add chlorine) . If your pH is below 7.0 or above 8.0, you'll need to adjust that, too.

Leave EVERYTHING else alone chemically, till you have stable overnight chlorine readings.

Do NOT add pool store goop: clarifiers, enzymes, metal magnets, algaecides, flocculants, sequestrants, phosphate removers or Super Duper Pool Gooper Upper. They will only complicate things and waste your money.

Do NOT try to 'balance' your pool water (except to adjust your pH, per above -- use borax for UP & muriatic acid for DOWN), or add stabilizer till you have stable overnight chlorine levels.

I'm out the door, so I can't get into checking pumps and filters right now.

Ben