Orenda SC-1000-GAL Scale Control & Metal Chelant 1-GAL

I have been using this for over a year now and am extremely satisfied with it. There are however some things that everyone should know when “trying” or using this product. First, it IS NOT a miracle cure to not have to scrub the pool tile on a weekly basis. I did have some scale on my tiles from a pool service that was not properly scrubbing them. After starting to use this product, over TIME (weeks), the scale was removed with weekly brushing and proper chem management. Basically, if the water is not balanced and the tiles are not scrubbed weekly, water line scale is still possible. I imagine that to be true of any similar product. (Orenda has an App for water balance and chem usage. I HIGHLY recommend using it to sort out your PH, ALK, Calcium, Stabilizer, etc.).The second thing…. Initial startup. The initial startup of using this product requires a much larger dose than the weekly maintenance. When the startup dose is applied, the chlorine level WILL drop to nothing. This will last for several days or so. I do not know why, but chlorine will try to react against this and…. the chlorine will lose that battle:-) Orenda has information on their site about this. But, in short, this is temporary and this chlorine reduction DOES NOT occur with weekly doses. I guess the chlorine soldiers figure out that this is not an invading force and go back to normal. Haha. That is my scientific explanation.Long term how does it do? I have a 3 year old pool and have no staining on any of the metal hardware in the pool and no water line scaling at all. Also, I originally purchased a couple quarts and went to the gallon and just refill the old quart bottles. It has been cheaper for me to buy by the gallon.