liter bottle filter?

[A.K.A Zak]

ok i can't remember exactly, but i have seen some kind of liter bottle filter thing, i don't remember if it was for salt or fresh water aquariums. it's like 3 or 4 bottles right beside each other that are all connected by tubing, if at all you know what the hell i'm talking about can you tell me the consept of it and the name, ohhh and if you can give me a link that would be great! thank you.

 

[A.K.A Zak]

no buddy heard or saw something like this?

 

[Tragic Avenue]

RO water filter? maybe DIY co2 bottles(yeast sugar and water)

 

[Mogo]

Diatom filter maybe? One of the LFS around here has a 4 canister one that they wheel around on a dolly