Yup your pump is not strong enough. You ruled out the wand. I'm not at home currently but I'll come back and tell you which pump I have. Its cheap and been used for 7 years and it had a dual outlet. I'm pretty sure I paid less than 20 bucks for it. If it can supply 5 air supplies two which in my 200 gallon tank it should make your wand super bubbly.It worked in my 55 gallon. Not as good as I wanted but good enough. Now in my 120, I get nothing. Not 1 bubble. If I blow myself it comes out perfect, the way it should
I saw where you said you found the search feature but I had already submitted the post and I knew what you meant by "bubble curtain" and those wands can also get clogged.....those pumps you have,are they fairly new?I found the search, it's not an air stone so it doesn't "clog". I think it's cause of the pressure. I'm guessing I need a larger pump to run it.
I would go to a local fish store to get it. I'm surprised none of them worked. Where is your air pump? I always put my air pump above my tanks or very close to the top. My air pump rated 3 gallon worked in my 200 gallon tank and a 20 gallon tank. Used both temporary for a week but worked.
This air pump came with a 1.5 gallon tank which now my nephew uses for a betta tank.
http://www.amazon.com/Tetra-25846-Whisper-BioScrubber-3-Gallon/dp/B000HHQ712
I usually go to my LFS for my fish. But my closest LFS is 40 minutes away. Petco is 3 minutes from my house
Its so loud and obnoxious lol
Make sure you have those check valves that won't let water back flow when the power goes out.I have the pump all the way at the bottom of the fish tank stand. Have nowhere to put it up high. My tank is displayed on both sides so it's hard to hide stuff except for underneath