Bought our house 2 yrs ago. Pool was disaster. Got it going. Last year opened pool, beautiful and was ready to go. This year opened it up and was greenish. We use Simple Blue and did not know you don't use algaecide just put manager in and do normal opening. Well, we now have a foam pool. He put way to much algaecide in and whenever we turn the pump on it foams. How do we get rid of this? It is a 24' above ground. Do we have to drain and refill? Thanks for any help.