Here is probably the best mod I've done so far. I have to credit my 6 year old. Also posted in QC tank tour. Well I got to say after the tour I have had serious skimmer envy.�So I showed my son a neddle wheel after work today and he said he new where to get one. Off to Hy-Vee we went. Here is my new custom mod and helper. I had to valve it back some it was throwing to much out. It is producing more micro bubbles and much smaller than my mesh mod. BTW It might be good to have a DIY and or an equipment section.