OK here is my problem. I have a 6 foot 120 gallon tank set up with salt. Its been running now for 7 months and no serious problem have arises. I have a Berlin 250 gallon protein skimmer. It has been working perfectly since day one. It is using a 700 gallon/hour pump ( recommended) . NOW recently i had a minor velvet outbreak. I caught it in time and treated it with a ich/velvet cure and it worked well. ( rare for me ). BUT since i treated it the protein skimmer still works good BUT the micro bubbles spill out threw the output or whatever ya call it and fill the entire tank. It clouds it up and takes away from it beauty. If i turn off the skimmer they go away in about 2 mintus and it look perfectly clear and gorgeous. BUT IT SUX to have to do that to enjoy looking at it every time. I have tried cleaning the skimmer. Changing the bubble input. restricting the pump flow. just about everything IN FACT yes everything. So My Q's are... am I correct in assuming that the treatment has some how changed the properties of the water or the surface tension? (The skimmer is still pulling out blue even tho you cant see it in the main tank). It is a hang on skimmer) I do not use a sump to to limited room for it. Will this problem go away?? and has anyone had similar experiences like this? Is there a solution to speed up getting it back to normal ( preferably not changing the entire water volume .