Send some pictures,yes tetras do well in a group of 10 or more
It doesn’t look like a 30 gallons ,but I would add real plants before adding more fish,measurements?This is the tank.
Ya live plants make the environment more safe and comfortable,but don’t over add maybe just add 8 moreah I see just a little bit smaller, either way if i do add some plants would you say it’s safe to add a couple more tetras to make them happy?
You can add as much plants as you want,yes 8 tetras of the same species8 more tetra or plants?
But both need to be attached to wood and not in the substrate neither need fertiliser but they do benefit from it just something to noteokay awesome, thank you!