This is my first time to the forum. I found this site last night and I must say I've already learned a ton with regard to water chemistry. Here is my dilemma.
I opened my pool a month ago to a swamp. I managed to get the water crystal clear and the chemistry correct within a week or so of hard work. My liner is completely covered with stains that look like algae on the floor and walls. The stain is not completely solid and seems to be in the pattern of the water flow in my round pool. The center of the pool has about a 2-3 foot radius where the stain is lighter. I thought at first that when the water was circulating and killing the algae, some of it settled and stained the liner. I've pushed my chlorine level off the chart trying to knock it out that way. No luck. I contacted Bio-Labs and was told I had metal stains. $75 later after adding their "Stain Remover" product, no luck. The water is clear, the liner looks horrible. Anyone walking up to the pool thinks I have a algae problem. Everything I read regarding algae states that it can be brushed off. Not this stuff. I can scrape it off with my finger nail but at that rate, I'd never get it clean. I brush, brush, brush one spot and it lightens somewhat but not much. Also, I put the white ladder in later on and no stains on it all which leads me to believe the "swamp" had something to do with this. Can anyone help me? I'm embarrassed to have anyone over to enjoy our pool.