I have a Glofish tank at work, a Green, Pink, Blue (and formerly a Red) Tetra variety. The Red did well at first but then seemed to hang out down in the corner of the tank and quit eating. It finally just starved to death and I removed it. Not sure if I may have injured it during one of my weekly gravel cleaning/water changes. The other 3 have been doing wonderful though and eat like piranha.