if your using any kind of water conditioner/declorinator with a "slime coat" producing stimulant/additive, it will make it microbubble like a maddog. if so stop using it and it will stop in 3-4 weeks. my seaclown works absolutely awesome, and i have absolutely no microbubbles. the only mod i did was drill a new hole dead center in the lid, just big enough for airline to run through it, and run a limewood airstone all the way down into the first chamber. connect this to a descent air pump and youll have way more mico-bubbles in the reaction chamber, without changing the water pressure too much. (more air=more skimmate.) i pull out a full cup of dark, black, sludgy, and just generally foul skimmate evry single day! oh, mine is the new desighn that actually has an o-ring for the cup/ body junction. if yours doesnt, seal it like stated earlier. you want all the air to exit through the cup lid. i also run at exactly one full turn from closed on the air intake. :devil: