http://www.zebradanios.com Zebra danio aka zebrafish information RSS 2.0 generation class http://blogs.law.harvard.edu/tech/rss http://www.zebradanios.com/startup-guide.php You really should have a 20 gallon or larger, but you can get away with a 10 gallon tank. Danios are very active swimmers and thrive in longer (as opposed to tall, cylindrical, or hexagonal) tanks. They\'ll still survive in a tall 10 gallon tank and many people keep them in 10 gallon tanks, but if you\'re shopping for a new aquarium, go for a long 20 gallon. http://www.zebradanios.com/nitrogen-cycle.php This is a lot simpler than it sounds. Aquariums need to be \"cycled,\" which essentially means that bacteria in the tank are able to convert ammonia from fish waste into nitrites and then into nitrates so that the fish don\'t get sick (or die) from ammonia poisoning. This bacteria, by the way, isn\'t harmful to humans or fish; it merely feeds off ammonia and converts it into less toxic substances. http://www.zebradanios.com/feeding.php Danios are omnivores, and their diet should consist of a staple flake or pellet food with an occasional treat like freeze-dried bloodworms. http://www.zebradanios.com/glofish.php GloFish are zebra danios that have been genetically modified to glow under blacklight. In normal light they are flourescent shades of red, green, and yellow. Apart from the different coloring, they are otherwise identical to zebra danios. http://www.zebradanios.com/diseases.php Noticing red or purple gills? Are your fish very close to the surface gasping for air? Ammonia poisoning is common in new aquariums that have not been cycled. A quick fix is an ammonia detoxifier like Amquel+ or Ammo-Lock (I prefer Ammo-Lock). If it\'s an emergency and you don\'t have that, do an immediate partial water change. http://www.zebradanios.com/breeding.php Zebra danios are one of the easiest species of tropical fish to breed. The trick is to make sure the other danios don\'t eat the eggs, which they will if this is not a densely planted tank. One common solution is to put the danios in a separate tank that uses marbles as the substrate (the idea being that the eggs fall in between the marbles where the danios won\'t be able to eat them).