I have bought tetras twice. Once from my local pet store. We ended up getting behind an accident and the road was closed so it took us over 45 minutes to get home. I then bought a set of 7 glow tetras in a 10 lb tank from a neighbor who didn't want to maintain any longer. Needless to say they lived in an algae filled tank for about a month she said. Basically telling me these guys were indestructible ( exaggerating of course but basically saying their resilient little fellas). I get home super clean the rocks. The toys. The tank. Took better part of 2 hours. I put water in and reset the tank.