I did some research in to the N2 system. I don’t feel it would hurt to leave in for the season but I wouldn’t be out the cost of replacement for next year. I would pull the cartage at the end of the season. I pulled mine and tossed it after about a month but that was a personal decision. The system will work with the N2 in place but I wouldn’t use the 0.5 ppm chlorine level suggested but Zodiac. I would follow Bens best guess chart for chlorine level. I would be cautious if you have already have metals in your water. I would also caution use of any copper based algaecide. The main thing I would follow the advice of the pros here they do know their stuff.
Steve