When it comes to choosing the perfect tank mates for your Celestial Pearl Danios, there are a few things you need to take into consideration. First and foremost, you need to make sure that the fish you choose are of similar size. This is important because if they are not, the larger fish may bully or even eat the smaller ones. Secondly, you'll want to pick fish that have similar water quality requirements as CPDs. This means choosing fish that can tolerate slightly warmer water temperatures and prefer a well-oxygenated aquarium. With these guidelines in mind, here are some great options for tank mates for your Celestial Pearl Danios:
Tetras - Tetras are a great choice for tank mates because they come in many different sizes (so you can find ones that match up well with your CPDs), enjoy warm water temperatures, and prefer an oxygen-rich environment. Some popular tetra species include neon tetras, black skirt tetras, and bloodfin tetras.
Barbs - Barbs make good companions for CPDs because they too come in a variety of sizes so you can find some that will be just the right size match. They also do best in warm water conditions and tend to like being in groups (so your CPDs won't feel outnumbered). Common barb species include tiger barbs, cherry barbs, and gold Barbies.
Gouramis - Gouramis share many similarities with Danios when it comes to preferred habitat and water conditions so they make natural allies in the aquarium world. They come in all sorts of colors and patterns which can add some nice visual interest to your tank as well. Popular gourami species include pearl gouramis, kiss gouramis, and dwarf gouramis