we are new here. thanks for having us. we have had a pool for the last 25 years. we had the ig gunite pool redone 7 years ago because it was not taken care of by previous owners. we were advised to either paint or have the gunite redone. we chose the gunite way. our problem was algae. we could not control it.
last 6 years were trouble free until 2 weeks ago, when we opened the pool. (we always use a winterize kit from lowes) uncovered the pool, water crystal clear, filled pool up with city water as usually. shocked pool and vacuumed. pool water clear. rained 2 days later and pool went green. treated pool for all 3 algae. we have used 25 pounds of alk to get ph up to where it is suppose to be. after being used water gets a green tint to it. we shock it and it clears up within an hour. we have a heyward clorine feeded.the problem we have is there is the yellow foam in the skimmer and around the water level of the pool that we are getting. pool place said it was residual and not to worry about it. we have cleaned the walls and bottom 3 times to get rid of this problem. this is our test results from yesterday. fc .83, tc 1.85, ca 90, ch 241, ta 123, ph 7.4. shocked pool last night. fc this morning was 1.5. water crystal clear. still had yellow foam in water. what do we need to do