Aye guys, so 2 days ago I woke up and I noticed a clear film/layer on top of my tank with bubbles on it and bubbles around the edges and coming out of my filter. That day I did a 25% water change and it helped with the problem, but bubbles still were seeming to come out of my filter and make a plopping sound as it hit the water. Today, I woke up and the film was back on the water. I believe it is a protein build up and has created a protein layer at the surface. So now, how do I properly fix this problem and fix the bubbles from the filter too? My guess for the filter is to clean the sponge of where the water come out of the filter (the foam guard), but Idk, you guys tell me.