splashing

Hello everyone, So i tried to go sockless for a full day just to try and see how it goes. I wa amazed by the big increase in noise levels from the drain line as well as the huge splashing that was going on! I've got an old photo i took before running my setup to give you an idea about where...

I am curious for tips on how to make my aquarium a bit quieter. The sump system is in the basement but the aquarium seems to make a constant splashing sound. I'm wondering if anyone has some sound reduction tips to help me out.