We are new to pools, never having one and am just learning. We have well water and have to top off. I know the metals in the well can be an issue and turn the pool water brown from what I have read and create some staining. Everything I read was filling the pool, and not topping off. I would assume that topping off over time introduces more well water. Is it safe to top off? Would we have to have the well tested first to see where our levels are in the well? Would appreciate and info anyone can provide. Thanks and I look forward to being a part of this community more as we are eager to learn.