I thought it might be nice to build my cardinal tetra school back up. So a few days ago I had a total of 7 neon and 7 cardinal tetras. Today I have 2 Cardinal and 4 neon tetras. I am finished buying these stupid fragile fish! Ammonia 0, Nitites 0, Nitates 40ppm (which is what it usually gets to right before I do a water change. Tank mates are 2 pearl gouramies, 2 dwarf gouramies, 5 fancy guppies, a few mystery snails, a few ghost shrimp and a very calm female krib.