This is an inert substrate. It is actually a very fine gravel. I was reading here and thought sand was recommended? My other small tanks have a type of sand, but it also does not affect PH. Thanks for the help with ID. There is very little if any color to the tail, perhaps a tinge of red on one. That does resemble them. They appear to have the fine blue at the edge, one more so than the other. I am curious if I even have a pair, although they are constant companions.
The
PAROSPHROMENUS PROJECT
