ugf pipes

sharpie

AC Members
Feb 2, 2006
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on an ugf what are the pipes that have the air line running through them with charcaol on top for? how does that suck stuff under the gravel. and do people still need to use those if they are using a power head?
thanks
 
The lift tube and air line create the driving force for the flow.

Water always tries to reach an equilibrium and maintain the same level. I am sure you probably played with a straw and a liquid refreshment. When you stopped drinking throught the straw, did you notice the fluid in side went back down to the same level as in the glass?

In an air driven UGF, the air bubbles displace water in the lift tube. This lowers the total weight of the water in the tube, as compared to the weight of the water for a similar volume outside the tube.

Water outside the tube will push down, through the gravel, under the plates and up the tube. If you slowly lower your tank level as you do a water change, when the water is reaching below the tube top, you will see this flow action.

You do not need the cartridges and air line if you are using a powerhead to pull water up the tube. The power heads will increase flow dramatically as compared to the air lift method. This increase the amount of oxygen righ water getting to the bacteria colony living in the substrate.

You can also set up some powerheads in a reverse manner, to push water down the tubes, under the plates and up through the gravel. This keeps the substrate cleaner and pushes the debri into the water column to be removed by other means of mechanical filtration.

Some HOB/HOT/canisters can also be modified to drive UGF plates.
 
The charcal (Activated Carbon) :) is for chemical filtration. Don't worrie about it there is not enough in these uplift tubes to do a whole lot of good. This helps take out amonia and other harmfull chemicals.
'

Activated carbon is good but the small amount of it doesn't do a whole lot. I have ran systems with and without and don't realy care if I have it or not. I sometimes will put it in filters I make sometimes I don't. I use it in filters that I make that are going into new aquariums.

Do not get me wrong Carbon IS GOOD. It has saved my fish from many problems before. I had an major amonia spike once and I loaded about a pond of charcal to the system after a water change and my levels dropped quickly. Then I started looking for the cause but with no avail and it never happened again.

There will be some debate on these fourms as to use carbon or not. Use your own judgment. While it will do what it is ment to do you should be able to live without it if your other filters are kept in good repair. I see both sides of its use just decide to use it or I dont' no real factors involved other then how I am feeling that day.


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