Silly question but i thought you had to have the little bit where the water flows out, out of the water a little? So its pulling the water right up and through the tube and then the flowing water breaks the water surface?
This is how ive always had mine, otherwise in my mind, its not really pulling water through the sponges, just producing bubbles? IDK haha :wacko:
I think it's worth pointing out a drawback of sponge filters: they are noisy.
Both the airpump itself and the bubbles that come out of the filter create sound. For this reason I am going to change to another filter type as soon as I have my permanent tank set up. I've been using sponge filters in my tadpole tanks and the noise gets on my nerves.
I think it's worth pointing out a drawback of sponge filters: they are noisy.
Both the airpump itself and the bubbles that come out of the filter create sound. For this reason I am going to change to another filter type as soon as I have my permanent tank set up. I've been using sponge filters in my tadpole tanks and the noise gets on my nerves.
I've always had mine under the waterJust because you can't see the water going out the tube, doesn't mean the water isn't moving through the sponges. It still is.
I suppose it probably doesn't matter either way...?
Really? My sponge filters are extremely quiet, I was actually really impressed. Like boomsloth I have two tetra whisper air pumps, and they're essentially silent. They have a soft running sound and that's about it. My fan is louder.
And the bubbles are so small they don't make much sound for me either. *shrugs*
I live in a small dorm room, so if they were that loud I'd never sleep xD
I didn't realise you could get nearly silent air pumps. On the tropical fish forum I go on there was much discussion about them and everyone concluded they all made noise. I must check out the tetra whisper then. :happy:
You definitely should! They're dirt cheap on amazon. XD And quiet! I've heard stories about them getting louder over time as parts vibrate out of place etc, but I've never had it happen and I've had mine for a while.
The bubbles push past the water next to the inside of the sponge, displacing it upwards. Something needs to replace this water, so more water moves in from outside the sponge to do so - the same principle a syringe works on. Whether the bubbles emerge out of the filter above or below the surface doesn't really matter, the process happens along the length of the passage traversed by the bubbles inside the filter.