After some reading around the forum, I'm beginning to realize that a lot of the yard chemicals I use all the time are likely to cause problems if they get into the pool.
Iron (azalea fertilizers, grass fertilizer) -- pretty sure this is a big issue even in small doses
Manganese (palm fertilizers) -- is this a problem?
Magnesium (epsom salts for most plants here) -- is this a problem? Might be what made my CH test go weird or maybe I was just sloppy.
I realize that fertilizers in general are going to feed algae in a pool but it seems that metals are a whole nuther issue as far as staining. Are there any others I need to be concerned about?
Plus, I am pretty sure that there is nothing that I can use near the pool for scale and other pests on my plants near the pool. Does anyone have any advice on plant care near pools? I've found 20% vinegar for killing weeds, but it is dreadfully expensive. I can use DE for slugs and snails. I've read about dabbing scale with alcohol but that seems pretty time consuming for these large plants.
One day I'll figure out how to post a photo of this tropical jungle around my pool.