How big is the tank and what kind of fish do you have
That sounds a bit overstocked...10g with 6 guppies 2 tetras and 1 small pleco (rehoming soon)
I would return the tetra as well as Pleco be uses tetra should be I larger groups or upgrade to 20 gal and get 3 more tetra
I would return the tetra as well as Pleco be uses tetra should be I larger groups or upgrade to 20 gal and get 3 more tetra
None of those fish will fit in a 4g except maybe one guppy.