Trying to deal with possible algae issue will do the OCLT tonight, but would like to bump up my chlorine levels today just in case. Brown stuff on bottom and sides of pool, brushes up, water a little cloudy, have had lots of debris from the 500 trees around our place. My question is what is my SLAM FC number with a CYA level at 0 and a SWG? CYA is a pain in my backside--I am afraid to get it too high so I end up adding it very slowly, so slowly in fact that I have never seen the dot disappear despite the liquid running out of the top of the cylinder. I am hoping someone will help me here are my other numbers and pool info. This is my 4th year with our pool, which my husband and I built ourselves from a kit. Have learned a lot--mostly what we should have done as opposed to what we did--have used the test kits (TF 100) and methods recommended on this site since day one and my pool has looked great!
Pool Info: 20x40 in ground, 1.5 Hayward super pump, 24T sand filter, Aqua rite SWG, Hayward 400,000 BTU heater
Here's our little oasis in Iowa: