I’m in the process of replacing the resin and filter media for my Waterboss 900 softener. I’ve flushed the tank, from the bottom, of the resin. I also tipped the tank upside down and flushed it of the filter media, but I’m not sure how much media actually ended up coming out from the top of the tank. I’ve filled the tank with new resin. But now, I’m a bit puzzled as to how to replace the filter media. I received a 1 lb bag of gold colored filter media. I believe I’m to pour it into the water inlet port on top of the tank. But it sure doesn’t seem to want to go in. I could only get about an eighth of a cup into the port. It doesn’t seem to want to flow into the tank. Am I doing something wrong? (Obviously I am). Can anyone advise?