[sphelps]

What does zeobak have to do with anything, is this guy using it?? If you're supplementing with bacterial type additive a UV will obviously interfere but if you're just starting out like I mentioned it's a good tool to have especially when a QT isn't being used. You don't have to use it forever, just when you need it.

Yes a UV will kill virtually anything that passes through it but yet what exactly would be considered beneficial? The amount of free swimming bacteria compared to the bacteria that attaches to surfaces is minuscule so it won't have an effect on your tanks ability to cycle waste. Other organisms are virtually useless to someone starting out and is just trying to get a fish population established. Sure once you have an established reef and want to start keeping fish and other animals that require these micro-organisms you don't want to run a UV very often but until then it's a good tool to have.

It also obviously won't cure a fish with ich but talk to anyone who's had problems with ich and you'll learn it usually comes in waves. The fish will get ich and recover fine but it recovered by the use of it's slime coat which is now depleted. The second wave comes and the fish cannot usually recover. The UV HELPS prevent the second wave and other fish from being effected.