No Mor Problems® is 41.4% sodium bromide. There are not two versions for different pool types -- what they sell for chlorine pools is sodium bromide (see the
PAN pesticide database). It turns your pool into a bromine pool if you use more than just a small amount. Because bromine is not moderated in its strength by Cyanuric Acid (CYA), it kills algae even if your CYA level is high. We do not recommend using it because it increases chlorine demand since bromine still breaks down in sunlight and is not as protected by CYA (since it does not bind to it), it is extra cost, it creates more hazardous disinfection by-products (brominated THMs are more cancerous than the chlorinated THM chloroform), and one can prevent algae growth using chlorine alone if one follows the
Chlorine / CYA Chart.
There's an interesting discussion about No Mor Problems® including a response from the manufacturer in
this thread.
The greenish color when adding chlorine to water containing bromide is normal in blue vinyl pools because what you really get is more concentrated bromine (until it dilutes) that is yellow/brown and against a blue vinyl background yellow+blue looks green. As noted in
this thread, you might also notice a similar effect if you add acid to the pool.
If you didn't use too much of this product and related products such as algicides that treat yellow/mustard algae that are often sodium bromide, then eventually the bromide bank will go away as some bromine outgasses, some gets oxidized to bromate, and some gets backwashed as brominated organics. Water dilution will also lower the level, though slowly. The dosage rate is 5 ounces per 5000 gallons which translates (if the bromide is oxidized) into about 4.8 ppm bromine equivalent to around 2.1 ppm chlorine.
