How much is the TDS increased if Borax is added to 50 ppm

[smallpooldad]

Well it was not black or mustard algae.

Chlorine remained stable over night, for 3 days, at 40 ppm, pumped it back up to 40 ppm every night for 3 nights. So me thinks maybe adding Yellow Treat (Sodium Bromide) will do the trick, as these two types of algae are thought to be chlorine resistant.

Added 4.5 oz of Yellow Treat and pretty much nothing happened. Chlorine got used up and went down to 30 from there it has been a very slow descent to 12 ppm of chlorine. At 12 ppm of chlorine last night and 12 ppm chlorine this afternoon at 3 pm, it has been very overcast today and yesterday.

The stains were primarily lightened when I initially added Borax, and then when I scrubbed with a wire brush. However, since then really no change still some light stains in the plaster maybe from 9 years of not knowing the Pool Forum. Why did you not call me in those 9 years?

The Borate is around 70 ppm and perhaps this is why the chlorine stubbornly refuses to go down any faster. What are your opinions?

If that is the case, I will report back, and then maybe Chem Geek you have found the answer to controlling chlorine use.

Chem Geek, if this is true then be careful if you see any guys dressed in black suits with violin cases and wearing a yellow Wal-Mart smock!