A chlorine level of 3 is not high. Chlorine at 3 ppm is the very minimum level that you can keep a pool and not get algae, IF there is no stabilizer in the pool.

In order to clear the green, if it's algae, with a CYA of 10 (not sure how they got that, I've never seen a tester that could distinguish levels less than 30) then you need to get the chlorine up to 12-15 ppm and keep it there by testing and adding more chlorine as many times daily as you can. It is getting the high chlorine level and sustaining it until the pool is cleared up that will get rid of the algae. Keeping it at 3 ppm is wasting time and chlorine if you're trying to clear up the pool with algae.

Don't add anymore clarifier or phosphate remover. The metal out is to keep the copper in suspension in the water and keep it from staining your pool (which can also cause green water). The best way I know to tell if the green is algae or copper is to test your chlorine at night, and then again in the morning before the sun is on the pool. If you're losing chlorine overnight, then you're fighting algae. Also, if the green water is "thick" looking, it's algae. If it appears clear, and you're not losing chlorine overnight, then it's most likely copper staining. Testing the water will help you differentiate.

Janet