I have a hang-on filter/skimmer (skilter). It runs just fine, but I have a nagging question. There is a clear plastic tube with a stopper on the end of it that sticks up and out above the waterline and runs directly into the impeller pump. When I remove the stopper, the water being pumped into the filter becomes filled with bubbles, and it makes an unholy noise.
Should the stopper be removed or should it remain in place? I am worried that I am not properly oxygenating the water if I leave the stopper in place, however, the noise created is just terrible.
Should the stopper be removed or should it remain in place? I am worried that I am not properly oxygenating the water if I leave the stopper in place, however, the noise created is just terrible.