Actually a good idea that I use that I attach it to my filter so that the bubbles go with my water flow. There is a piece that I use to attach to my filter where the pipe attaches on to and it also really helps to power up my water flow which my cichlids love. If it sounds a bit confusing I will take a picture of the way it works, I think it will really help and look good in your tank. What type of filter do you have? I know pumps can be noisy as I have had 4 of them but this one that I am using is really quiet. I will find out the make tomorrow for you and will also get a picture on of that piece and the system of the way it works.
PS What type of plant is that on the left side of the tank and the one right of the orange pot in the first pic? I have been looking for that kind of plant for ages but never know the name.