I just recently went form a 75 gallon sump/fuge to a 100 gallon stock tank... I will hopefully NEVER have to use a standard glass tank sump again! I love all the room and ease of taking out pumps, skimmers etc... for cleaning. also, an added plus is more water volume. I am lucky enough to have an inwall tank in my basement , so the entire room behind is my fishroom, so the size of the stock tank is not an issue. Like I said, I hope to always be able to use one of these.