got a few more tetras fish from petsmart for $1 each except for the guppy like $3

Looks like the existing left over guppy are dying, it look weak and sick for some reason, the two pink tetra are fine and 2 glofish already dead, and one guppy dead, now the last guppy look like it’s going to died. Anyhow they new addition tetra look strong so does the new guppy, not sure how long it will live though, if some more fish died I’m just going to keep the one that are strong and live and maybe buy more of it.