With its vibrant orange/red colour, The Red Neon Blue Eye is, in my opinion, one of the most beautiful small aquarium fish.
Pseudomugil is a genus of fish endemic to Australia and New Guinea, where they are found in freshwater rivers and streams and bodies of brackish water. They are, to the best of my knowledge, related to the rainbowfish family – but are technically not true rainbowfish. The popular name for the genus is Blue Eyes.
The Red Neon Blue Eye is native to New Guinea, Indonesia. These fish really shine when kept in shoals of 6-10 fish or more in a densely planted rainforest style tank, preferable with some shading from floating plants.
I’ve kept this species in more than a year, and the colours have just grown more and more intense. While a lot of pictures on a Google search show these fish as orange/tan, mine has developed a deep red colouration.
I may just have got hold of a very colourful strain, but it might also have something to do with the way I keep these fish. Anyway, I want to share my experience on keeping and breeding the Red Neon Blue Eye. They are very adaptable – and can be kept under a variety of water conditions – so this is just my way of doing it.
 
Water conditions and feeding
I keep the luminatus in a soft and slightly acid rainwater/well water mix, and feed primarily live food: brine shrimp, daphnia, cyclops and vary the diet with frozen bloodworms and flake food. Keep in mind, that these fish have small mouths and need small food items, especially as juveniles. I keep their tank at room temperature – which means fluctuating temperatures: down to just under 20 C (68 F) at night and up to 25 C (77 F) during the day.
I have always kept these fish in a species tank, and have no experience on how they would thrive with other fish, but I suppose they would do fine with most other peaceful nano fish. I have kept shrimps in their tank for a while, and it worked fine. The luminatus have small mouths, and I never saw them chase baby shrimps. Right now they are alone in the tank though.