If you had to pick the most reliable which one would it be .I spend 300$ a year on just chlorine not to mention closing and opening chemicals. I was told by a pro who lives down the street who owns a residential and commercial company to get this one called Aqua Rite I will have to see i have it written down some where. I dont know which model he was talking about but said it was like 800$. My pool is 20x40 3 foot deep and a 9.5 foot deep end.I just spent 5 ,000 on new pool equipment and liner. New pool heater parts /Timer parts/Liner/concrete work/PVC pieces and done it all myself with help form this forums. So i saved my self like 1000 or so in labor now i was looking at spending the labor on 1 of these units.