Barnacles can extend it's penis up to 30 times the length of its body. Barnacles are sessile and unable to move from their settled location. In order to overcome this motility problem, the barnacle can extend it penis to any near neighbour in order to impregnate them with it's sperm.
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.
Reproduction of the graph (in table form) from The Living Aquarium, which indicates the thickness of glass required for a given panel length and depth.
Number of discussion on making tanks out of glass. Covers drilling holes in glass without commercial glass drill bits, resealing tanks, constructing tanks and various information on tempered glass.
3'899
Water Parameter Maintenance / Calcium Hydroxide DosersIndex
Calcium hydroxide dosers for maintenence of calcium and alkalnity levels utilising calcium hydroxide powder mixed with water. This mixture is typically called kalkwasser.
DIY Links 
Information on working with acrylic, including types, sources, cutting and gluing.
Electricity backup is to be used when there is a power outage and keep the vital equipment on the aquarium running.
Providing more natural and nutritional foods is very important and culturing your own is a very good way of getting them.
Calcium hydroxide dosers for maintenence of calcium and alkalnity levels utilising calcium hydroxide powder mixed with water. This mixture is typically called kalkwasser.