New owner of a 17 year-old AG pool. I've recently swapped homes with my parents and the pool obviously came in the deal. It is currently, and has always been, a chlorine-free pool. I'm really not sure how they've managed to keep a clean pool for 17 years without chlorine. Truth be told I've been struggling with it the past two months. Everything was great at first, I just vacuumed almost every day because I have two young boys that seem to have accepted tracking grass and dirt into the pool as their current mission in life. A few weeks ago the pool became heavily diluted due to storms and another mishap. (In the interest of continued social harmony, I will leave that vague. lol) I restored the sanitizer (Aquasilk) level back to 50 ppm within 3 hours of the dilution and the water was already looking hazy. Within a few days it took on a light teal color, and the fight has been on. I've found it frustrating and expensive to try and stem the green tide. I've oxidized, algaecided, and scrubbed like a mad man for two weeks now. The water is slowly getting better. I've cleaned the sand, the baskets, all the hoses... taken the vinyl ladder clear out and scrubbed the algae off of it with a mixture of baking soda and water. It's so frustrating... How could peroxide based sanitizers be a good idea, outside of allergies? This is not fun... pools should be fun! My parents advice on how they've dealt with this "Ignore it, it will go away". When? After the water freezes? I am a waste-water professional. I work in the transportation side of the business, but I have access to considerable resources and the knowledge of very good organic chemists. Unfortunately, the limitations of this type of pool are only overcome with money and patience and I do not have an abundance of either. I'm looking forward to getting through whatever remains of this swim season and moving on to next spring when I will replace the liner (It's stained and looking shabby above the waterline) and reopen the pool with crystal clear chlorinated water.