Glofish are a man-mad variant of the zebra danio fish. These fish get to around 2.5 inches each and are highly active shoaling fish. It is absolutely not fair to keep them in groups smaller than 6-8 and they ideally need larger groups than that. These fish shoal in their thousands in the wild and are mentally and physically adapted to shoaling behavior. IMO, it's unnecessary and selfish to keep these fish in tiny groups.
Due to their adult size, swimming speed and activity levels they need much larger tanks than one would think for their size. The absolute minimum I would keep this fish in is a 24"/2 foot tank. Ideally I'd like to see them kept in 36"/3 foot plus.
Please ignore the money-whoring workers at Petsmart. These people are employed and trained buy a huge corporation that uses animals to spin profit. They do not recieve proper training - only what is needed to tell the average customer that they can keep lots of fish in tiny tanks. They will rarely mention sensible stocking guides, rarely encourage you to get a biger tank/not to get large fish for a small tank, rarely mention tank cycling, etc.
Fish keeping is NOT about listening to someone who is PAID to give you advice that makes their company MONEY. Fishkeeping is about research and listening to people who give you a GOOD REASON to do things that you don't like. It's not just about picking out the small number of people who tell you what you want to hear and ignoring the rest. That is how ANIMAL ABUSE happens.
There are very few fish I would consider suitable for a 2 gallon tank and bettas, glofish and goldfish are not some of them.
All fish tanks also need to be cycled and any newbie who goes into fishkeeping without researching the nitrogen cycle, fishless cycling and water testing is either an idiot who has not done enough research or has been mislead. However, even that isn't an excuse. The information is out there and is scientifically backed up. It's easy to find and people will often point you in the right direction.
Here you go -
THE RIGHT DIRECTION
----> http
/www.fishforums.net/index.php?/topic/331300-which-is-the-most-abused-fish-species/
thnks for the help! 
