I probably know the answer to this before I post. "Needs to be slammed" I'm having a problem with my water this year, other years also for that matter. I have the TF100 test kit. If the Cl level gets to 5 or below I get a cloudy water situation. Not green, just cloudy. I have a Jandy 1400 swg that is working but I have been supplementing with Cl as needed since dealing with all our oak droppings for the last 4 months. A few weeks back when the majority of the catkins were done falling, I ran the Cl to between 20-25pm for about 3-4 days and let it drop back down and water was of course crystal clear after. At the time I had CYA around 30 or less, so I figure that was even over kill. I have since got the CYA level to 70. Total alk is 110-120, Calcium Hardness 250, pH 7.4-7.6, Temp about 80, This am's FC was 4ppm with no CC. and the water is getting cloudy. I've fought mustard algae in the past but am puzzled if that is what it is now, since my readings consistently have no CC levels. If I do pop the Cl level up another 5ppm the water will clear. It has also been brushed 2-3 times weekly as well as vacuumed the same by hand. Filter is a 340 sq ft, 4 cartridge unit and I just put new ones in after the oak season was over. I'm assuming will have to do a slam and see where it settles out. I have not done an overnight chlorine test, guess that might be in order also. I know it's pooh poohed here treating for phosphates but I did that about 3 weeks ago with a commercial product since my levels were over 2000K and I have a very heavy organic load in this unscreened pool. I've read of some folks with similar problems that have been able to maintain clear water much more easily afterwards. If I can believe the pool store, my levels are now about 100. Any thoughts, other than do another slam. thanks in advance to all you knowledgeable folks.