[amerdunbar]

I had the same problem. I'm using the 6 gallon tank (4.5 gallon copy chrome). I had my compressor hooked up to the air tube on the filter pump for extra aeration, however the pump keeps it up a few inches, and I had problems with it directly blasting the part. If I turned it to the side, I got pits in my plate. I plan to go with bigger tanks eventually, where I'll use the rigid plastic threaded plumbing where the up tubes can be fastened to the sides of the tank out of the bath.

But for now, I used 3/8" PEX tubing, heated it and made two loops, the bigger being close to 10" in diameter. I used electrical tape to secure the loops together at one point where I bent the tubing up to connect to my air hose. I drilled small, random holes in the tubing loops, then just wedged the loop down to the bottom of the tank The filter pump sits on it, and helps hold it down, should it ever come loose. I used it for several hours and it worked perfectly. The bubbles are random, like a boiling pot, and it gave me one of the best looking platings I've had so far.

Another option is hot glue - it works great for plugging places I don't want plated, but you would have to have a clean dry tank to use it, and I don't know how well it would hold up over time in a tank. Like I said, works great for parts, but they're only in the tank for an hour or so at a time.