Check this video out..

Its cool, but I don't really understand how it works haha... :huh:
 
yea I have seen a few of these videos- the question is always how can they have the airstone running in those? notice how they never show you the top...
 
jm1212 said:
the water stays inside the tank just like the water stays in a cup after you fill it with water and then turn it upside down in a sink filled with water and pull the rim almost all of the way to the surface.
Click to expand...
well yea but wut happens when u need to doa water chnage
 
that is an insane tank. props to whoever's tank that is.
 
jm1212 said:
the water stays inside the tank just like the water stays in a cup after you fill it with water and then turn it upside down in a sink filled with water and pull the rim almost all of the way to the surface.
Click to expand...

yes, but you forget about the airstone
 
it has to have one way valves around the tank, that equal the in and out pressures, keeping them ballanced.
 
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