These are really active and colorful. As they travel through the tank in a group, it creates a magical movement that takes my eyes away from everything else. Pardon the all-caps, but TEST THE WATER IN THE BAG and compare to the water in your tank. These guys are sensitive to quick changes. Make sure that you follow a drip-method sort of acclimation to the aquarium water, even if all parameters seem close.
All 12 corys arrived healthy, about an inch in size. Still doing great 2+ weeks later. Very active, especially during feeding time. They are like little puppies.
These frogs make a fish tank come alive with their sudden appearances from the bottom of the tank to the top when they make a fast appearance for a quick breath of air. Great addition.