Neon Tetra
£1.50
Neon tetra... Paracheirodon innesi
Ah yes, the neon tetra. Practically everyone's go to fish for colour in a community tank.
These are produced in their millions all over the world, and I keep plenty in stock here at all times.
They can be a challenge to breed in tanks, mainly I believe, because the eggs are sensitive to light and therefore need almost total darkness for a few days after spawning. They also need a fairly low pH to spawn in the first place, which can be achieved using RO water or rain water.
Most people buy these little fish just to look at, however. I really wouldn't get less than 10. It's pointless. 20 is even better. or maybe 50. You get the idea.