the nubb in the bottom right of that spot might be, that spot is (was) one of the areas where it mounted it self to the skelle.
i will update every now and then but in doing this photo thing i found those old pictures and it just bummed me out. that nice pic is 2 1/2 years or so into the tank, oh well what can i do now? i learn more and more each day and x-mass is here i am getting new filters for my ro/di long overdue and some other stuff so there is still hope...........