One of the problems I foresee is detritus. That is why I didn't use as much rock, and left lots of space around the rock for the
clean crew to take care of. I also know I'm taking chance with the deep sand bed but I like gobies that like to burrow into the
sand.
excerpt:
But this is what don't want to happen:
Opening Up Our Closed Reef Aquariums
by Chris Cefola - Freshwater and Marine Aquarium, December 2001
The first attempt to solve this problem was to use powerful equipment such as large Protein Skimmers, UV Sterilization,
Ozone, Activated Carbon, and Denitrators. AU this equipment did was sterilize our aquariums to the point where we had to
now rebalance the nutrients lost. This task was accomplished by placing additives and food in the aquarium. It became
increasingly difficult to correctly dose the now sterilized water with the proper amount of additives, therefore, causing more
imbalances in the "closed system." To solve this new problem, many people, myself included, started looking into open system
natural reefs for an answer. Coral reefs are not self-sustaining; they need the ocean and shoreline around them to exist.
This is the proper why to set of your fuge.
This method is the closest we have come to emulating an open system reef. The first part of this system is a submerged
bio-ball chamber that not only breaks up solid waste but also acts as a plankton rearing area. The second chamber contains a
fine silt mud and Caulerpa taxifolia algae. Caulerpa algae in a reef aquarium have many benefits, such as its ability to absorb
waste products and its use as a food. It also produces a waste product called Gelvin. As a trace element, Gelvin may be
beneficial for our reef aquariums but in most cases the concentration seems to build up to toxic levels. Mr. Leng Sy solves this
problem by using a twenty-four hour light source, and a nutrient rich mud for the Caulerpa to feed from. This Caulerpa/mud
combination is a true self-regulating system. That is to say, as we add more animals to the system, nutrient balance is restored
by increased growth of the Caulerpa, alga and plankton. The third and final chamber contains more bio-balls to prevent the
Caulerpa from entering the pump.