I decided to make a thread on how to mod the seaclone for those of us who have one. I know this has been done before so I thought I would show my experiences with this skimmer. Mod 1: Modding the impeller There are different ways to do this, mesh, bioball cut in half, drill holes in the impellers and the fishing string. I chose to do the fishing string one because at the time I didn't have mesh or a bio ball. Start by cutting notches in each propeller on the top and bottom. I made about 3 notches on each side BE CAREFUL doing this because it is very easy to cut through the impeller. You basically just want to have little notches to hold the fishing line. Then take a small piece of fishing line and tie it around the base of the impeller and starting with the outer notch wrap the fishing line over and under each impeller and work your way to the center. Then cut the line and tie it to the base(which is not the easiest to do). All the mods do the same thing to break up the bubbles more. Mod 2: Cut the inner most tube down. this mod is a little harder to do because the inner tube is glued in. The purpose here is to allow the bubbles more contact time in the chamber. Take the skimmer cup off, remove the o-ring and take the outer tube out. Hopefully you can fit your hands down in to grab the inner tube and wiggle in back and forth till it comes out. You can use needle nose pliers. When I did mine it broke towards the bottom I had to superglue it back in. You can try hot water to try and loosen up the glue. Once you get it out, cut 2 inches off the tube. How much I cut off. Then replace the longer piece, using superglue if necessary to put it back in exactly the way it came out. Mod 3: Adding an air diffuser. This mod is to create more bubbles and by far has resulted in the biggest improvement to the seaclone. First you will need a wooden air diffuser, airpump, airline, package of air regulators and a wooden air diffuser. Start by cutting a hole in the top of the skimmer cap: Slide the airline through the top far enough to reach the bottom of the skimmer. Attach the air diffuser to the line and slide it down through the small inner tube (the one you cut in the previous mod.) Make sure the diffuser sits in the bottom chamber. Then hook the airline to a pump with a air regulator on it. The last mod I did was to cut a latex glove so it fit the bottom of the collection cup so it made a gasket between the collection cup and the second inner tube it sits on ( the o-ring is suppose to make a airtight seal but it doesn't). You will have to tune both regulators to get the skim you want. After I put the air diffuser in the cup was filled to the brim by morning what a difference. Well I hope this helps someone, any questions feel free to ask! Happy Reefing!