I want these! When I set up my 10 gallon tank, I special ordered these from a local small aquarium shop (that is no longer in business). What I got was hengeli rasboras, which I like well enough but they are not what I ordered. I don't know how closely related these two are. I have mine in fairly hard well water, pH about 7.4. They seem to be thriving. I've had them over a year and a half. They LOVE frozen daphinia. i also feed frozen blood worm, Hikari micro pellets and some flake food.