ANYONE STILL DOING THE BERLIN METHOD

[Nano_Man]

Hi everyone just wondering how many people still use this approach. It was big in the early 90s . I have a fish only tank which is 2 power heads and a skimmer.
I welcome your thoughts

 

[Mr. Mojo Rising]

Sure, I have 4 tanks, only one tank has filtration, the others are just flow and rocks.

Since the hobby relies on rocks primarily for biofiltration, I think every tank does the berlin filtration to an extent, wether they realize it or not.