My tank is now filled with water, plants, sand and decoration and I started the filter. When I filled the filter with water, I checked for airbubbles but didn't find one... So I thought it was okay to start the filter. Now it doesn't make a sound most of the time, but sometimes it does for a few seconds and then I see airbubbles rising up the pipes... Is this normal? If not, what do I have to do to fix it?
I hope for a quick anwser! Thank you!
I hope for a quick anwser! Thank you!