We are having quite a bit of problems with our solar covers. We are on our 4th and have had our pool for 3 years. It is an above ground pool - 24' round. Every cover starts to sink and the last one created an algae problem. Our new cover is only 2 weeks old and is already sinking. I have followed the directions exactly. I do cover the solar cover whenever I take it off the pool. Our chlorine level has even been on the low side. Any ideas? I hate buying yet another one. But, I think I will have to get one. Any recommendation on a type that might work well? This one was about $150 from our local pool store.