So since I remembered to bring my Macro Lenses to work with me i took the change to photograph some of the life that exists on the rocks and sand bed.
Below in the centre of the image we have a Tunicate (type of colonial sponge) I have several of these around the tank, also the pink/purple colour on the rocks is coralline algae; a hard calcifying algae, I love this tuff on the rocks and hate it on the glass
Micro Bristle Star in amongst some of my Macro Algae (this one is a Red Grape Algae)
A little Filter feeding Tube Worm in the sandbed, I have these over my rocks as well as a huge colony in the rear filtration section
Finally the smallest life in the tank that I am most impressed with, this is a Blue Tunicate (as well as another tube worm) this Sponge filters the water through vents in the side back into the water column.
All the above microlife add a lot of life and filtration to the water. Which is why I dose the tank with a combination of Phytoplankton, Rotifers, Copepods and Isopods. Ensuring that I keep the biodiversity in the tank healthy from the smallest to largest of living things