Just for future reference (don't get rid of them or flush them or something lol) but your tetras will school a lot more and impressively if you were to just get 8 neons or 8 glowlights instead of 3 and 5. I learned a bit late myself unfortuantely. They could live a long time though.
I have since put my ''mistakes'' in a 10 gallon even though they deserve something much larger where I can expand their schools...I ahte this apartment.