That's the key to the Euro reef skimmer right thar
I've looked at one running and wondered how the heck those bubbles came out so darn small.
Put that bubble factory on most any skimmer and you'll have a champ.
Goes back to the basic principle of a skimmer's production
1. Longer reaction time in water (height of skimmer) = better
2. Greatest amount of bubbles possible to react with = better
This pump takes number 2 above to another level and kicks rear.
I want one !!