Air stone.

[kllsoul]

Can some one help answer, is the one on the left better or the right? Or should it be somewhere between those two?

 

[FishGuest5123]

Depending on what fish you have going in, I vote for the one on the right. Left is a little strong unless you want to put it in the back corner.

 

[Guppy10]

Id have the left, just as ornamental value as you don't need one in reality.

 

[seangee]

It doesn't really serve any useful purpose - so whichever you prefer the look of.

 

[JuiceBox52]

Agree. Whichever you like best

 

[Lajos_Detari]

For me, I would choose the left one....
The right one has too little air bubbles and doesn't serve much purpose.

I usually like the longer type of airstone where it can cover bigger/wider areas,.