The stomach cavities of colonial polyps are interconnected, enabling food to be shared among all the polyps within the colony. If one polyp catches more than its fair share of food, it is shared with the colony.
The original and one of the largest list of DIY reef aquarium project links you will find in one place. The large list of links is almost been totally added into the new format, with the number currently (12/01/2006) being 483.
If you have a link to suggest, then please submit it for consideration. Or if you find one that has expired, then please
me so that it can be fixed. You can also let me know what you think of the new format and if there are any improvements that can be made to the way the information is presented.
DIY Links 
Protein skimmers that utilise a venturi after the pump the sucks in air and turns it into small bubbles in the water.
Set up, construction and theory behind fluorescent lighting, including wiring diagrams, instructions, parts lists and photographs.
Calcium hydroxide reactors for maintenence of calcium and alkalnity levels utilising calcium hydroxide powder. Also called Nilsen reactors.