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My tank dimension are 60 cm x 32cm x 37cmIt is a good idea to include the tank dimensions as well as volume when asking about suitable fish, as the linear area can often be more important. Danios generally like to swim more than say rasbora. This species, which I assume is Danio albolineatus (common names can be confusing), attains 2.25 inches (5.7 cm) needs at minimum a 60 cm (24 inches) length aquarium, but a 30-inch (75cm) would be preferable. I would assume a 64 liter would not be this spacious, but correct me if I am mistaken.
The celestial Pearl danios ideally but if they aren’t suitable also the other Pearl daniosThere are two fish with similar common names. Which one do you mean?
Pearl danios (as mentioned by Bryon, though he uses a different Latin name from Seriously Fish)
Celestial pearl danios
My LFS sell them in 5’s. Would that number be okay and would they be okay with my guppies?Celestial pearl danios (cpd's) are more suited to your tank than pearl danios. They are smaller and less active swimmers - it's the swimming behaviour which means that pearl danios, like zebra danios, are better suited to a longer tank.
Cpds are timid fish and do better in a large group and in a tank with a fair amount of decor. And they are fine in a 60 cm/24 inch tank.
Okay thank you for the help. Much appreciatedYou would need 10 rather than 5. They need a bigger group than the 6 usually recommended for shoaling fish. (Why do shops sell shoaling fish at so much for 5 when they need more than 5?)
They should be OK with guppies.
Pearl danios (as mentioned by Bryon, though he uses a different Latin name from Seriously Fish)