The Rainbowfish Aquarium Fish for the beginner and the Expert. Any good info on the life of UV bulbs would be appreciated. My experience has been that 6 months is too long and that my tank starts getting unhealthy before then. Yes, the time frame you are changing them is for optimum performance. However instead of throwing them away use them on an aquarium that may not have the same high quality light demands.
Fluorescent bulbs can last several years, but do lose intensity over time.
Marine tanks and planted tanks are the types of tanks I would most likely change the bulbs on a 6 month basis. If you need more info like what kind of light to use for a specific aquarium write again. Hi, I have noticed yesterday that one of the damsels is defending a little spot behind a coral. When I took a closer I noticed a nest of eggs on the glass wall of the tank. Please help how can I protect the future babies.