Join Date: Jun 2007
Location: Tsawwassen, BC, Canada
Actually, they are different fish. Celestial Pearl Danios are just that, DANIO's. The microrasboras are usually in referance to the Boraras species of Rasboras, ie. Merah, Maculata, etc.
Alo, I would not put any of those fish into a 2.5gl tank...ever!
2.5gl is the empty volume. Once filled with substrate, hardscape and plants, open swimming space is greatly reduced. even if the tank was empty, 2.5gl is not big enough.
I have CPD's and microrasboras, B. Merah, and both of them need to be kept in schools of at least 7, and both are active fish. Not super crazy like some danios or the whiteclouds, but still lively.
To keep a small school (and I use 'school' generously as 7 is not really a fair number to be considered a school, so from now on, it'll be called a group) of any of the Boraras or Danios, or even green neons or a similar shoaling fish, the minimum would be 10gl's.
For a nice desk-top 2.5gl, shrimp are wonderfull- they are curious, colourful, cheap, and have a very low bioload.
I, along with many other seasoned hobbyists are very glad you asked this question on here. Hopefully others that are wanting to set up small nano tanks can read this, and the other similar posts and can come to a reasonable and ethical stock list for their tanks.
Good on ya tiger!
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Ehei-Pimpfen 276 yo!