awesome tank from youtube, claims to be the first "open bottom tank"

[biohazardcustomz]

http://www.youtube.com/watch?v=qn5tDyBBCaw&feature=related

i think its a reallllllllllly neat idea.

 

[biohazardcustomz]

and here is a saltwater one by the same guy http://www.youtube.com/watch?v=C2EIO2hX1Hc&feature=related

 

[poly-nomial]

i dont get how that works

 

[Deep Blue Sea]

I bet its really annoying to try and get the fish out

 

[biohazardcustomz]

i was reading his description on the page and it explains alot of how it works and the better points of it. also he had a system to remove fish as well. i think its pretty f'n cool

 

[OmniTranz]

I've seen it before, pretty cool...I've also seen it implemented in outdoor ponds...Apparently you have to siphon out the air from the top of the upper tank while filling water in the lower. Just make sure you don't ever break a seal!

 

[Lepisosteus platyrhincus]

its an easy and simple concept. I built a approx 7g one

 

[busterbrown]

thats pretty sweet

 

[Sacklunch]

its the same as doing it with a cup in the sink its just pressure. i saw these today after seeing livebearerfreaks post

 

[DMasker]

i dont get how that works

Its pretty simple physics. As long as water cannot enter the water column the water will stay in the upside down tank above the water line of the lower tank. The fish are free to swim around the lower section and swim up the water column in the upside down portion. If air starts to enter the water column somehow water will be displaced and as much air enters, that much water will enter the lower portion. You can also make a stronger current as long as the rippled never allow air to enter the water column. Pretty interesting idea. Hopefully I explained that well!