sorry tom, not had chance to get on computer for a few days!
galaxies.....peaceful and wont bother anyone, its a case of anything bothering them, so avoid fin nippers (tetras etc). mine are on their own in an effort to breed them (not that they are breeding...but i never give up!).
many wont take flake food (still got wild instinct i guess for chasing live food, even if captive bred, probably only first generation captive bred), so daphnia, blood worms,
brine shrimp (bbs or adult brine shrimp). i give mine a tiny amount of flake twice a day, i have seen them eat a bit, but just to make sure they eat properly i give them daphnia 6 days a week and bbs nearly everyday. ive had mine since march and they're still going strong and quite plump with very bright colours on the males, so i must be doing something right!!
make sure you
acclimate them really slowly if you get any more as they are still quite wild (being prob only 1st generation) they are sensitive to change.....just think, for generations they lived in the inle lake in a stable environment!
also if you havent already, have a look at the link in "tans tanks" in my sig. whenever i stumble across a site about galaxies or find an interesting piece of info about them i add it there!
sorry i took a while to respond! hope they're doing well. how many have you got now? what are they with? at full grown they arent more than an inch with very little waste (their filter is always spotless and doesnt need cleaning unlike my filthy guppies and pleco!). they are a perfect little fish!