Avast Kalk stirrer outlet - above or below water level?

[RiceReefer]

Pros and cons?

 

[dwest]

A simple bent silicone tubing about a foot long that is above the water water line has worked best for me.

 

[Midrats]

According to our resident chemist here, above is preferable, as below will speed build up and clogging. I give mine a pinch every so often to dislodge anything.