Ive bought it before. Managed to keep it for a few months, then the water started to get dirty and Im suppose to order some 'special' detrirus pump from America to clean the water. Thinking back, its not worth it. Basically, they are just brine shrimps but I was fascinated by the caricatures drawn on the packaging. This was a few years back. Bought two sets, one was 'circus' and the other was 'glow in the dark'. Hahaha