I've had my Bubble Magus NAC5E HOB skimmer running off and on for about 4 weeks now on my 36g tank. I followed the start-up instructions (if you can even call them that) from the beginning. At first I was running my air-intake about 40% open. It produced a good amount of fine bubble which overflowed into the cup constantly, which I've read is normal for the skimmer. I had the water level adjustment about 1/4-1/2 the way open. I also ran the skimmer drain tube back into the tank because of the amount of water collecting in the cup. After the first week I was able to adjust the air-valve all the way open. I topped the tank off with RODI and the skimmer started going crazy so I started the adjusting process all over. Now it doesn't seem to want to keep a constant foam and keeps overflowing the collection cup. It's producing tons of bubble that just overflow the cup so matter where I adjust to. It is collecting crap in the bottom of the cup though but with the amount of water its collecting I'm really not sure what to do. Should I wait until I add more to my bio-load to try to adjust it? I started with dead rock in the tank, left it in the tank with the power head for about a month before starting the skimmer up. I just added a CUC yesterday and a few small frags from my 5.5g. Any ideas?