Blue hole cavern setup

[Andy Pierce]

Was browsing the interwebs and came across a fascinating setup from 'GreyWorm' who looks to be a Korean aquascaper. He (she?) has a planted tank setup with a hole in the "floor" that opens to a deep partially lit cavern. The effect is striking. Anyone given it a try - or brave enough to give it a go and post a blog? I can expect there would be minimal flow in the cavern unless specially engineered and cleaning it out would need some serious planning. The claims are no filter (which I can believe) and no CO2 (I have some doubts 😉). Some videos below:

 

[not called Bob]

very impressed, I like how out of the ordinary it is

 

[Jaseon]

Gives me an idea to do that paladarium style...nice.

No filtration? hes def using Co2

 

[Gill]

Yes, that came up in my recommendations so have subscribe to his account. It does look interesting, though how it behaves long term we will see.
If you like this sort of video I would highly Recommend Floo the Flowerhorns channel