So, my IC40 stopped working late last summer (2010), and I've been manually dosing with liquid chlorine. Now that pool season has rolled around again, I'm faced with a choice: Purchase a replacement cell for ~$500 or switch to chlorine tabs. I could continue using liquid chlorine but the inconvenience of buying and transporting chlorine every week makes tabs a more attractive option.
I loved the IC40, but this is the second one that failed in a little over 3 years. I wouldn't mind buying a replacement cell if they would last the 10,000 hours that they are supposedly rated for, but I don't want to spend $500 every 18 months. The guy at the pool store says that I can probably get by with a 50lb bucket of tabs for a whole year (~$125 with tax). Plus, I probably won't need as much acid as I was using when my SWG was working. So it seems that the real cost of switching to tabs would be under well under $100 per year (and that's not even factoring in the electricity savings from not operating the SWG). I can deal with replacing tabs in a floater once a week throughout the summer, and 1-2 times a month during the winter months (we don't swim, but I don't close the pool either).
Does that logic seem correct?
Is my experience with the IC40 unusual? How many IC40 owners have had their cells last more than 3 or 4 years? FWIW, the first year I had the pool, I ran the IC40 at around 5-10 percent duty cycle for about 15 hours per day. By my calculations, that's 5475 hours of operation, but only about 500 hours of "ON" time. How does pentair come up with their 10,000 hour expected life?
Any other things that I should consider?