I have all the plumbing hardware and have been looking at all the instructions on how to install just have to get in the water and do it. I will need to drain some of the water because it is up to the gray line right now and my ? is how high can the water level be with the new skimmer? We like to have it right at the level it is now but looking at pics of installs it looks like it needs to be lower, can you go half way up the skimmer or is that even to high.