The bubbles are primarily for aeration obviously, but if the sponge filter is turned up high enough the stream of bubbles seem to be creating flow.
The bubbles are primarily for aeration obviously, but if the sponge filter is turned up high enough the stream of bubbles seem to be creating flow. Again, I'm just going by observation so I could be totally wrong, but just giving you my point of view from what I'm seeing in my tank.