Nature 2?

[Crystal Clear Pools]

My 2 cents. I have a 36500 gallon pool with spa and waterfall. On the large size I'd say. I have salt water system, ozone a big DE filter and Nature 2. I run my filter 11 hours a day. My salt water generator keeps my chlorine at a nice 2-3 ppm. I keep my pool at a nice 85 degrees. I shock as necessary. Last year I tried not to use the nature 2 and bang I got alge. This year again I tried not to use it and bang alge again. Maybe for smaller pools its ok not to use it. But im a business guy and travel 4 days a week and dont have the time to hover over my pool. When i get home for the weekend I just want to swim and have fun. When I do use the nature 2 cylinder it allows me to turn my chlorine down to 1 ppm. I purchase my nature 2 filter at focus pools for 85 bucks. And its the big -45 unit. I've now been using nature 2 for 6 years and like it. Just my 2 cents.