Ive had these little wonders for 5 days now and love them more each day. Still having trouble sexing them, but they are not fully mature so no worries there. They are in a 20L tank with Ph 7.0, and soft-med water. I will eventualy raise the Ph and hardness, I'm just allowing them time enough to adjust before I start. These guys are healthy as little horses, and eat like pigs! For the first day they were very skitish as was expected, but after a few days of feeding bbs, these guys are out and about all the time. Feeding the bbs really seems to have helped them ease into there new home better and more comfortably.