First of all I would try and bump up your Cory cat schools and glow fish schools to 5+. In the 37 you could get away with a school of fish such as tetras. As for the ten try a peacock gudgeon
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I agree. The fish you already have need to be taken care of first and they will be much happier in larger groups. You can use the 10g as your qt tank for the 37 until you get that sorted.
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