Whats good to do in Buenos Aries?

Can't decide between buenos Aries tetras or x ray tetras!?

• So I have a 20 gallon tank, I only like x ray tetras (albino ones) or pristella maxilarus and the buenos Aries but I heard you shouldn't mix the two as the buenos tetra might harass the x rays.. This will be a species tank so if I choose the x ray tetra, how how many can I put in my 20 gallon tank? Same with the buenos Aries tetra, only picking one.. Any help or advice on which one?

• Answer:

  I'd suggest the X-Ray Tetras. You could stock up to 10 in a 20 gallon. Buenos Aries Tetras are too large for a 20 gallon IMO. These fish grow to be 2.5-3". If you chose them, I'd not do more than the mandatory Tetra grouping number of 6. Also, if you're considering live plants, the Buenos Aries would be out, as they devour plants. The X-Rays would be fine. Good luck.