What every you do do not buy the Fission nano....should be called a nono.
Utter complete crap.
:lol2: Not only did I learn that lesson but Aquarium Adventure Taught it to me for a million dollars.
I have modified mine with egg crate in the back so....so have filter floss on the top only overflow the others I put the slats in. I keep carbon, floss, and PO/SI remover in the back along with a LED bar that I have settup for a mini fuge with cheato and 3lbs of LR rubble. I left some space in the platform that I made out of egg crate for the floss so I can get the siphon into the bottom.
What type of LED bar are you using. is it exposed to the water or did you install it in the cover?