Most shrimp keepers know them but few have actually tried to keep them: Sulawesi shrimp like Caridina dennerli (also known as the cardinal shrimp). They have a reputation for being difficult and can definitely be a challenge, but their color and fascinating characteristics make them more than worth the extra effort.
If you're looking for an easy species to start with, Sulawesi shrimp most likely aren't for you. Although cardinal shrimp are among the easiest of the Sulawesi species, they're still only suitable for experienced shrimp keepers. If you're new to the hobby, why not consider something a little easier?
Cardinal shrimp can be kept in aquariums of at least 5 gallons, although it's probably a good idea to go for something slightly larger to make sure your water values stay stable. Equipment-wise, you'll need a filter, heater and possibly an extra air pump to make sure the water is well-oxygenated.
Most Sulawesi shrimp keepers prefer to set up their aquariums in a way that mimics the lakes these shrimp naturally occur in. For cardinal shrimp that means a dark, carbonate rich substrate, rocks, driftwood and possibly a few plants. A porous rock type that has plenty of surface area for algae to grow on works best.
Because this species can be quite shy, it might be a good idea to not overdo the decorations and go for a relatively weak light.