Just got my new above ground pool and we been using it for a week now. Still trying to learn as much as possible by reading on this site and asking folks. I have a 15 by 30 above ground and a Sunshine Pools in line Ionizer.. Water is very clear and tested ok. The pool store i purchased if from does not deal with Ionizer, they sell salt system but decided to use the ionizer after talking with the installer and some friend who have the same unit and say it works awesome... I did visit another pool store that does sell a ionizer system and talking with them and asked about shocking your pool and they told me to not use a Chlorine based shock. To put Chlorine tablets in the skimmer and maintain PH level etc and shock it once a week with a Non chlorine based shock. The installer said to just put tablets in the skimmer and run the ionizer and once every four weeks pour a gallon of chlorox in. Confusing, any thoughts opions, my biggerst concern is waking up one day and pool be green. Have a neighbor beside me and his has been green ever since he opened it and still fighting it now weeks lager. Thanks