Pool and forum newbie. Thanks for the great forum.

I've done a lot of reading here so far after turning my new pool water brown. So now I know my city water has high iron content. I've read a ton about getting rid of the brown water and am doing that now.

So now I'm focused on how to avoid brown water next year. I don't think I fully understand the concept of keeping the iron in suspension. Do you have to keep sequestration agents in your pool all year? Or do you just need to do it long enough to filter out the (invisible) iron somehow?