Originally Posted by
bunnyl99
What is a UV?
UV Sterlizer. It is an ultraviolet sterilizing light source that water passes through. They are anywhere from $120.00 here to $260.00 plus shipping on this site and well worth the money in my opinion.
UVs perform the process of eliminating biological contamination, namely parasite fungus and bacteria by altering the DNA. Two types are commercially available, both in tube size. Generally the one containing a wet bulb - at which the water passes directly past the UV bulb- is cheaper.
The dry bulb process has a protective quartz tube around the bulb. Both work on the same principle.
If you are medicating a tank (and you shouldn't medicate your display tank) turn off the UV light as it can render the medication useless since the DNA of pathogens are altered by gluing them together. Since DNA of pathogens are altered (making them unable to reproduce) medication is altered as well and will most likely become useless.
You should replace the bulbs about every six months as they do lose their effectiveness. The bulbs just don't burn out, rather they fade out first. Bulbs for mine run about $30.00 each - and I have two different brands of UV sterlizers on two different tanks.
With reef tanks there is extra considerations you may want to read up about as there is evidence that points to microscopic critters beneficial to reefs could suffer. Read up on it before you invest in one for a reef and make your own determination for reef usage.
Hope this information helps you out.
Denise M.