Hi - I need help! I'm a first year pool owner but have so far managed my pool OK this Summer. My pool is an 8m x 4m salt pool, with a newly installed chlorine generator. All was fine until last week when I found mustard algae (I recognised it from pictures and descriptions online). It was a yellow, dusty deposit on the pool floor.
Other chemistry seems OK - PH at 7.2, TAC at 120, CYA at 58, salt at 3.
I shocked the pool twice using chlorine tabs + turned the generator onto to S (shock). I also scrubbed walls and hoovered. The algae resisted even though the chlorine level was 10+ for a couple of days solid. I looked for help online and under advice I added sodium bromide NaBr. It appears the algae has gone - great - but I am now surprised to find out that I have a bromine pool. It's totally unstable, it shows almost zero chlorine and not much more bromine after only a few hours of sunshine (this with the pump running and chlorine generator set to 8 out of 10). I really don't want to have to leave the generator on max all the time.
I know it's difficult to turn the pool back to a chlorine one without draining. I have a liner pool and believe it can cause damage if you totally drain it - is that correct. I'm pretty desperate. I was relaxed enought to be testing the pool every 2-3 days until this happened because it was stable. Now the sanitation varies by the hour. Is draining, somehow, my only solution?
Help!!!
Laurie