I just got a new fancy metallic butterfly halfmoon (his name is Louboutin!), just wondering if the claims that UV filters are needed for white fins are true? He's in an established, heated, completely cycled 6 gallon tank so I don't see why he would have any trouble. Thanks!
Sure, UV filter has a UV light in it, that's meant to kill bacteria. But as far as I can tell, it also kills beneficial bacteria, which I don't want to upset the established nitrogen cycle. At the moment this tank has a HOB filter which I'm hoping will be fine.
I've just heard that white tails are notoriously hard and want to get on top of it before (/if) any problems start.
I wouldn't use it then honestly. The filter is the main colony of beneficial bacteria, so I wouldn't risk it. He might marble out too- I had a teal butterfly and now he's solid royal blue. UV light has nothing to do with it- it's genetics. Your guy has an even enough band where he might be stable, but it's all chance basically.
Yep I've read up on marbles, don't mind if he does! He wasn't sold to me as one but I'm not worried. I've never used UV in my past 6 years of fish keeping and no one can seem to give me a straight answer so I'll just leave it. Thanks for your help though! The only thing I could think of is that they *might* be more susceptible to rot, but in an established, clean, cycled tank that isn't going to happen.
Most if not all UV filters the UV light never touches the filter media where the BB live and Most BB is UV resistant, it targets stuff mostly pathogens and algae, I have a UV filter on my 46 gallon tank and to be honest I am not sure it really makes a difference but I can say I have not had out breaks of sicknesses in it and I have had some in my 40 gallon without it, but that could be just luck, it could help it wont hurt.
Thanks guys! Heard back from a trusted breeder (so I thought I'd post her answer here too). She said in a completely cycled bachelor tank there's no need, as long as you keep up with regular, regular water changes - otherwise the tail will disintegrate. Hope it helps some other people out there too! :)