You would need many bottles, but if you or the previous owners were on the pool store turnip truck for a while, you could have easily hit the metals threshold. Usually with metals it's clear green, not hazy green. It may also be clear metal green *and* algae hazy green. Post some pics when you get a sec.
Get a sample to the pool store to test for metals. They actually kinda get that one right and it's a good # to know either way as your baseline. Tell them you need to run home to check your supplies after the test. You think you have XYZ in the basement. Wink. wink.
Also not all algecides contain copper but most do, especially the poolstore / Walmart ones.