Hi guys. Here's my story for 2 wonderful years I followed Leslie's maintenance plan and had no trouble in my 10K gallon vynil pool. I added 1.2lbs of dichlor every 2 weeks, had their kit for the water test (to watch FC levels and pH), and cleaned my cartridge filter once a week.
The third summer I decided to experiment and instead of a cartridge filter bought mesh filter(because it is easier to clean). I drained and refilled the pool. Slowly, but surely water in the pool turned hazy. Then I decided to shock the pool with dichlor, added 4 lbs, changed filter back to the cartridge and the BIG trouble rolled in my pool. I started seeing mustard algae. Came across this website and did a number of things. I bought Taylor's CYA test. First, the heat in the mailbox damaged the reagent, as a result CYA readings were super low. Bought another one, watched the delivery and took it from thr mailbox before sizzling or getting warm. Still could I trust it, not sure. However moved on, tested CYA 30. Bought FC DPD test. Performed regular slam, along with brushing, cleaning, cartridge cleaning and such) at 18.2-19.0 for 4 days, it did not kill the algae, just reduced the amount, and then Yellow/Mustard slam at 30ppm. Almost got rid of it, but not quite. After completing 24hours by the midday the algae came back with the triple revange (at FC= 18.2 ppm). The pool liner faded significantly. Now I am blaming everything on a wrong CYA readings, possibly being way to high for any successful SLAM. Tired and discouraged.
The third summer I decided to experiment and instead of a cartridge filter bought mesh filter(because it is easier to clean). I drained and refilled the pool. Slowly, but surely water in the pool turned hazy. Then I decided to shock the pool with dichlor, added 4 lbs, changed filter back to the cartridge and the BIG trouble rolled in my pool. I started seeing mustard algae. Came across this website and did a number of things. I bought Taylor's CYA test. First, the heat in the mailbox damaged the reagent, as a result CYA readings were super low. Bought another one, watched the delivery and took it from thr mailbox before sizzling or getting warm. Still could I trust it, not sure. However moved on, tested CYA 30. Bought FC DPD test. Performed regular slam, along with brushing, cleaning, cartridge cleaning and such) at 18.2-19.0 for 4 days, it did not kill the algae, just reduced the amount, and then Yellow/Mustard slam at 30ppm. Almost got rid of it, but not quite. After completing 24hours by the midday the algae came back with the triple revange (at FC= 18.2 ppm). The pool liner faded significantly. Now I am blaming everything on a wrong CYA readings, possibly being way to high for any successful SLAM. Tired and discouraged.