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UV lights are bad for any living creature though, >.> and I mean excessive amounts. Regular tank lights are fine, UV or black lights is a form of ultraviolet light, a longer wave length than the UV ray that is often blamed for skin cancer. But it can still cause cancer and skin and DNA damage even though the light we use on our fish is the lesser safer form. That's why I say not to leave them on like you would a regular light.

And...Sterile? XD That's a funny story you had BABY GLO FISH~! Lies from the biology genetics department. They are very much fertile.

We sell quite a few Glofish at the store where I work. Something I've noticed is that the Glofish seem to have much more cases of scholiosis than the regular zebra danios... I wonder if there's a connection, or is it just coincidence? I've also heard people say that Glofish seem to have higher metabolisms than their natural counterparts, but I'm not convinced.

Thanks for being the first person to get it! 3nodding

you have some of the facts out there, but you have changed a few of them, or gotten them from a poor source. let me explain... yes, glofish were manufactured from zebra danios to turn florescent colors to show that water was polluted. however, this was a failed experiment, making the fish permanently florescent, so that they don't show if water is polluted at all, or even that they are in water. also they were created to help pollution research, but buying a glofish doesn't help fund for research or help pay off the failure. a few years ago when this experiment failed they sold the miscreants to pet stores all over, and well, they were hot at the time. so buying these fish only will get you one in your tank, not help fight pollution or let you know that your water is polluted. and they are a nice fish for a more modern or colorful tank, but to be perfectly honest, they aren't the most florescent freshwater fish. just thought you'd like to know ^_^ maybe ad this to your top post so people are more informed.
also from personal experience, all danios do not need to school. they are more than fine alone, unlike tetras and some other specific fish. though they do like a couple buddies. 3 is more than plenty

In that aspect no fish ever needs to school. Any tetra, barb, carp, danio or rasbora can survive alone. They don't need to have their species around to stay alive as long as you take propper care of them. but they won't really be happy.

I also have had experiences with survivers, those that lagged behind after the rest of the school died out, in the case of one tetra it even lasted nearly two years. But they aren't 'happy'. They'll eighter just hang in one place untill it's feeding time, or they become finnippers.

An exeption to the rule is when you keep a similar species, danio's aren't too picky and will also school with guppies, barbs and young goldfish also tend to hand together and nearly all tetras are compatible.