high phosphate levels

[aylad]

Yep, most of the time, phosphate remover is really good--for the pool store's profits, but not much else. In theory, phosphates are algae food, and you should eliminate them to keep algae from being able to grow. But in practice, the best way to control algae is to not let it grow in the pool in the first place!

If you will post a set of test results (taken with drop-based testing--no strips!!) here, especially your CYA level, then we can help you get the green cleared up. We're going to need to know some basic info about your pool, so if you'll put it here, it will save a lot of back and forth posting to get necessary info.
Pool Chart Entry Form
Pool Chart Results

Also, we need to know what chemicals you've put into the pool, and what type of chlorine you use normally (Ingredients, not generic names like "shock"). And you say well water--do you have iron, copper, or other metals in the well water?

[PoolDoc]

Sorry your post & membership got lost in the crush; not sure if you still need help, but your membership has been upgraded. -ben