Ah, I see. I thought you were referring to other chemicals dissolved in the pool water.

I'll keep it sanitized with the cal-hypo for now, going through the skimmer slowly and watching the outlets for blow-through. Maybe it will tell me on the pail, but does anyone know what the dosage rate is (X ounces will increase Y gallons of water by Z ppm free chlorine or whatever)? It's 73%.

My wife has a Sam's membership with her employer, so we'll make time soon to go get some dichlor.

I'll post back here with updates/questions.

Thanks again.

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Never mind my dosage question. I came home for lunch and found the answer on the bucket. X=1, Y=5000, Z=1.

I slowly added 12 oz through the skimmer closer to the filter and did not notice any blow-through.

I am starting to see a tinge of yellow around the edges.

I'll test, add more cal-hypo if necessary to get to 5 ppm and brush well this evening.