properly tune a skimmer - how to?!

[whatcaneyedo]

Restrict the air flow to get the bubble size you want. Then adjust the foam height to where you want by restricting the output. Once you get it perfect do not touch anything as its a PITA to find that sweet spot again... if for some reason your skimmer starts acting up it probably means you just fed the tank some oily food, something died, something spawned, or it just needs to be cleaned. Heres a little trick: run a decent amount of fresh water through your air intake weekly (I use a full 1 gallon bucket) to dissolve any dried on salt that forms inside. Here's what my Bullet 3 looks like. BTW what skimmer do you have?