Hi all,
Been battling some algae. Thought I had it licked last week, then it came back after having the pool covered every day this week. Problem I have is that I'm having trouble telling whether it is mustard or green, as my IG vinyl pool has a blue-turquoise liner. I initially treated it as mustard, but I am wondering if I misdiagnosed it. Any hints on how to tell?

Also, what is the best way to treat it if it is green? I have never had green before. Do I just make sure I keep my FC way up?

And another thing, please help settle a debate. My DH says that covering the pool does not help the algae grow. I say it does! He wants to keep it covered so it's warmer and more enjoyable. I want it uncovered until we stop getting algae!

Thanks!
Erica