AgentSPS
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<a href=showthread.php?s=&postid=14521036#post14521036 target=_blank>Originally posted</a> by Johan Susanto
Yes the rubble goes almost all the way to the top. The pipe running down the center is the drain from the overflow. It dumps under the grate which supports the rubble. The water then flows through the rubble and spills over a slit at the top into the baffle chambers.
so the rubble working sort of like fluidizer with LR inside?
do use any light for the rubble? [/B][/QUOTE]
The idea of the rubble tower was modeled around a cryptic zone. There is no light and the tower is made of black and smoked acrylic. The rubble, while still serving the purpose of nitrification and denitrification, mainly serves as substrate for sponges and other cryptic zone life to attach to.