Glo-Fish Tetras Aggressive?

[imat]

Glo fish tetras... Are they aggressive? I have a 55 gallon tank I just purchased. I have two glo fish tetras in a smaller tank. I don't want to keep the small tank. I plan on trying to have a school glow fish tetras in my big tank. Other species that I plan on having in the tank are : candy cane tetra , rasboras , oto catfish , possibly upside down catfish. (These are all established in the tank already).
I have a few others in there but will be getting rid of them (they came with the tank I purchased). One I plan on getting rid of is the skirt tetra because he is being mean to the rasboras.
I also want to get some glow fish danios.
Would those be compatible? Do I need to worry about the glo fish tetras being aggressive? I do plan on getting enough of each kind to have schooling groups.
My daughter loves the glo fish.

 

[DreamertK]

They won't be aggressive unless they're kept with 6+ of their own kind, 10+ the better. Skirt tetras tend to be aggressive tetras, usually the bigger the more aggressive. Danios are genetically modified fish, so you may or may not want to purchase those if you have any sort of ideological beliefs. With the catfish, they tend to do well in groups, but they're larger and might limit how many schooling fish you can get. Otos can be difficult to take care of, they're one of the most slaughtered fish in the industry since they only eat certain kinds of algea and are very skiddish.

 

[imat]

So the tetras WONT be aggressive unless they are kept in a group of 6 or more?
The upside down catfish came with the tank. It is really cool but i wouldn't want to purchase more of them.

 

[DreamertK]

Oops, they will be aggressive unless they're kept in a group of 6+ (preferably 10+). I have 15 of them in my tank and they're as happy as a pizza pie. There are tetras (like the skirts) that will nip at my gourami, but these don't.

 

[the_lock_man]

The Glofish(R) tetras are genetically modified black skirt tetras. As Dreamer says, they are notoriously nippy fish, and I have read reports that they are nippy even in a large group. I have never kept black skirt tetras, so cannot comment from experience.

 

[imat]

Hmmm. These are the main fish we had wanted too but they are expensive... Would hate to buy 8 or so and find them nippy and hurting other fish

 

[the_lock_man]

Gotta be honest, I'd hate to buy them, period. But then that's just my take on things, there are so many naturally beautiful fish, even those that have been selectively bred that way, what's the point of adding a fluorescent jellyfish gene into a fish?
 
Obviously, the point is that the false colours are attractive to people, particularly kids, and the manufacturers realise they can make a profit from it.
 
(Yes, I know that isn't why they were originally engineered, but at some point, someone, somewhere, realised they could also profit by selling them to the general public. And then they realised they could do it to different species, too)

 

[imat]

I understand what you are saying.  We just liked them because of the blue light effect.  well...hmmm...  would I be safe getting the glofish danio instead?

 

[TwoTankAmin]

Glofish are genetically danios fish that are actually patented. I would urge all hobbyists not to buy fish like this or any fish that are dyed, tattooed or artificially modified with genes from other species.

 

[imat]

oh.  gotcha. I am so new at this that I have been spending so much time researching...i hadn't gotten to that yet.  just assumed it was another name for a kind.

 

[Freedom]

Glofish are a 'man made' thing and many hobbyists do not approve of the practice.  They come as either a modified tetra, or as a modified danio. 
 
I have one of each, gifts from unknowing friends. 

 
Glowlight tetras are a natural fish, but those are not going to give the blue light effect you mention.
 
As others have said, there are many colorful tropical fish available for a nice looking tank.