Thanks Dennis! DH used silicone (I know it's a cop-out) but it seems to have worked. Now we are noticing a very slight and slow leak from the filter where the top and bottom come together. We tightened the clamp as tight as it would go but there is still a small amount of water trickling down. At this point we are letting it go because we have GOT to get this system running since our water has been sitting in there for almost a week with no filtration and/or chemicals. Today we put in 1 cup of muriatic acid and ran the return on top of the water to aerate. About an hour later, we shocked it and kept the pump/filter running from 12pm - 8pm. This afternoon we added 1 more cup of acid because neither the PH or the alkalinity dropped much after the first attempt. Still a work in progress, but tonight we got the solar on for the first time hoping to raise our temp a bit from the cold 70 degrees it is now.