Recent content by AndyPoolSpa

I don't know if this is at all related or not, but there are some stains in the pool. Several of them are rust colored and have been there for many years. I think they are iron. I haven't tried Ascorbic Acid on them yet. More recently, I noticed grey colored stains. I thought they were black...

Today's test results, all taken within 30 minutes of each other. First, the OTO/pH test: Chlorine level looked like 4, but then, like before, it kept getting darker until it stopped at dark orange. ph: 7.6 Because it seemed high, I turned off the chlorinator. Then, I tried a test strip. TC: 0...

Yep, the bromine definitely complicates it! I did the FAS-DPD test. Results: FC: 1.5 ppm CC: 0.5 ppm That's weird! It seems like the OTO measures something else. Whatever it was, it either disappeared overnight, or is not tested by FAS-DPD. Also, I smelled the "fishy smell" in the pool water...

Ok. So bromates can build up. How are they removed? Only by draining and refilling? I have no idea how many chlorine tablets have been used. I've been back and forth about using them because they raise CYA. I haven't used them recently, until today. The pool has been partially drained and...

I answered in my last post. I haven't used bromine tablets, just chlorine ones, so I don't think there would be any DMH. Probably something like 20 lbs of sodium bromide over about 8 years. About the bromates: I thought the chlorine would convert them back to active bromine, but I could be...

Actually, no bromine tablets were used. My bromide came from "Yellow Treat" or "Stop Yellow" that really is just sodium bromide. As for how many since filling, I don't really know. It's been something like 8 years since filling, so probably something like 20 lbs of it total. That was before I...

I used it in the spa recently, but not the pool. It's possible some MPS was added to the pool years ago. So, basically no. Thanks for the quick reply!

I've looked around this forum for a while, but this is my first post. The pool runs on bromine. The sun breaks down the bromine rapidly, so this morning I put 2 trichlor tablets in the chlorinator to try to use less chlorine bleach. My understanding is the chlorine activates the bromide. This...