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jandocky (November 30, 1999 at 12:00 am)
excellent tank although you didnt need to have a hole at the top just put an airline with a float up through the bottom and just suck the air out as you fill with water. would like to see the other design you had made
5teampunker (November 30, 1999 at 12:00 am)
Awesome tank and nice video
junioribanez66 (November 30, 1999 at 12:00 am)
if your power goes off you're fucked !!
idiot12494 (November 30, 1999 at 12:00 am)
That is an awesome tank, superb job on it and the plants add a really nice look.
jasonlpsmith (November 30, 1999 at 12:00 am)
@webnician I am not sure how much negative pressure they can handle, it probably differs between species. The top water level is about 0.3m above atmospheric pressure water level, so the pressure difference is about 3kPa. A 3kPa difference in air pressure is approximately a difference in altitude of about 800m. I think a fish in a lake 800m altitude would be the same as the top of this aquarium near sea level.
jasonlpsmith (November 30, 1999 at 12:00 am)
@jorasave Thanks. The pump has two one-way valves built in (it is a diaphragm pump). I keep the pump off most of the time since it is noisy.
jasonlpsmith (November 30, 1999 at 12:00 am)
@leannvlewis Thanks. I used an Eheim internal filter that was a little bit oversized for the tank to keep the water in constant motion to prevent stagnation of the water at the top and keep the oxygen level in equilibrium with the air. I put the filter at the bottom of the tall section to keep the water moving everywhere in the tank.
webnician (November 30, 1999 at 12:00 am)
I've thought about this for years and finally went looking. I have yet to find an answer to several questions: How much negative pressure can the fish take? Would a fish swim high enough to harm themselves or do they instinctively avoid it?
jorasave (November 30, 1999 at 12:00 am)
is awesome!! do you have a valve that prevent the air go in if the power shots down?
ookachaka10 (November 30, 1999 at 12:00 am)
I've done this before. It uses an upside down tank concept |
