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Discussion Starter · #4 · (Edited)
Yes I've tried adjusting the lines, if I unplug the airline from the sponge filter that's not working air comes out of the tube. No matter which airline goes into that last valve, air never comes out. I'm thinking my pump isn't strong enough to get air to all the lines.
 

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Yes I've tried adjusting the lines, if I unplug the airline from the sponge filter that's not working air comes out of the tube. No matter which airline guess into that last valve, air never comes out. I'm thinking my pump isn't strong enough to get air to all the lines.
That's because there's no back pressure or restriction when you unplug the line. Like I said get a few valves and splitters from petsmart for a couple bucks and you should be set! :)
 

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You need cheap Air valves to adjust the back pressure.

Cheap one like this:



You can find the cheap ones at your local fish store.

You put them inline of your air tube. And adjust the air flow so then in the end, the last/furthest away air line will get air.
 

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I'd put one on every line and play with the balance until all your sponges are bubbling equally.

Back pressure in this case is going to be any sort of obstruction or force acting against your airflow. In this case it's caused by your sponges and the difference in hose length between each one. As well as the water pressure pushing back against your airline.

This whole thing should be < 5$ to fix.
 

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Yes put one on all the line and adjust them.until you get equal amount of bubble per filter. Best you can

Hanzorz at Verizon.net
 

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It depends on what brand/model pump you have now.

How many filters are you trying to run? Are you using air stones in the sponge filter?
 
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