Split one airline to two features?

[Skrabbitskrabbit]

I’m trying to split my airline tubing to accommodate an additional bubbler. It’s currently hooked up to a sponge filter. When I added a splitter, it only blows bubbles out of the new feature and not the sponge filter. I checked and the air comes out but I guess isn’t strong enough so wondering if I need to get a new air pump that’s stronger or if it’s possibly just not hooked up right. Both features have a tube going out of the tank to a T joint which connects above of the water ann lid and then one line below goes to a valve and then the pump underneath the tank.

 

[Demeter]

This happens often, an adjuster for the one that is working will help divert more air flow into the other side and hopefully they can both work that way.

In some of my sponge filters I find it helpful to have an air stone inside the tube rather than just hooking it to the sponge filter itself. It may take less air pressure for the pump to push air into an air stone than into the sponge filter. Depth of water will also effect things, deeper water needs a stronger pump.

Buying a stronger pump or a pump with two attachments will fix it too but I try to cheat the system and make things works w/o spending more money.