I am a 2nd year pool owner and have been reading the site for a year and just now realizing how much great info there is on here.
Last year I spent the year bouncing up and down on my FC levels, so this year I learned about the SLAM and OFCT.
So after having 3 dogs and 10 people in the pool on 4th of July I again started my chlorine/shock/test approach and as you can expect I did not have good results. So I learned more and now I am into my 3rd day of a SLAM and OFCT cycle. I just cannot get the FC to hold overnight. I am loosing about 5ppm so each day I check the pool several times and add liquid Chlorine to bring the level up to the right shock level (using the CYA Table) but it just keeps dropping.
Sorry but I do not have all my numbers, but here is a good idea.
Pool, 18,500 gals.
2nd year Pebble tech finish
in sun 50-60% of the day
I usually use a solar cover but have had it off during the testing.
Trying to hold FC at 12ppm per cya chart
I can get all the other numbers but when I had the pool store check them they were OK.
We have had some small spots of algae that we could only see when swimming with gogles.
I have been brushing the pool daily.
Would just like to know how long the SLAM and OFCT should take? several days? a week? should I add more chlorine over the 12ppm mark?
Also, my wife is wonder if our solar cover is part of the problem. There is what looks like some algae on the edges of the cover, will this keep contributing to the problem?
Looking ahead to a much better summer,