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I presume you had black algae which is why you used the Black Out Trichlor product. To get rid of black algae, it requires not only exposure to chlorine, but brushing with a heavy brush (wire if plaster; very stiff for other surfaces, but usually black algae shows up in plaster pools). You need to scrape the waxy surface layer from the algae to expose its depths to chlorine. Once you maintain a chlorine level consistently, it shouldn't come back. You said you brushed extensively, but might have needed a different harsher brush head.
If those measurements are from the pool store, I wouldn't trust them. The CYA seems low.
As for the ADBAC, it can foam and it breaks down from chlorine faster so you usually notice a higher chlorine demand when using it. What happens to it is that the chlorine breaks it down into an organic without the nitrogen in it and it might get caught in your filter depending on your filter type. 152 ounces of 30% ADBAC (C 12-18) which has typical molecular weight 377.8 g/mole. I don't know the density of what you used, but I'll assume 1.3 g/ml and I'll assume it takes two chlorine to react with the chemical. So 2 * (70.906 g/mole Cl
2) * (4495 ml) * (1.3 g/ml) * (1000 mg/g) * 30% / (377.8 g/mole) / (132489 liters) = 5 mg/L or ppm chlorine as a wild guess. It could be more, but not a lot more. So that doesn't sound like very much chlorine demand.
Did you ever measure a chlorine level since opening the pool? It's possible you had bacteria convert some CYA into ammonia over the winter. However, that will usually show up as CC. Also, your FAC/TAC implies something like a DPD test and realize that those bleach out at high chlorine levels. This is why we recommend you get a proper test kit such as the TFTestkits TF-100. See
Test Kits Compared.