I have an AG pool with a sand filter. My source water comes from our well. We do not drain our pool, but just top it off in the spring & when necessary. We have extremely high iron content in our well water. Our water can be crystal clear but then we add topoff water & it's instantly orange. Our solution in the past (and the only one that worked) was to add about 5 Ferratabs. In 2 days the water would be crystal clear again. Ferratabs have been the only product that has worked. The liquid metalfree products haven't worked. My dilemma now is that I cannot find Ferratabs anywhere. Our local dealer said they were discontinued. Does anyone have any suggestions on where I can find this product or what I can use as a replacement. Iron is the only problem we have with our pool. I know all about why our water turns orange & how the chlorine reacts w/ the iron. I just want to know how to fix it when it happens. Thanks so much for any info.