I would up the number of Otos to at least 6, and I'd exchange the neons for cardinals
Barbs are a great choice. Very active fish. Sometimes aggressive. They swarm like piranhas. One drawback for you... they will attack and/or eat any thing that moves and can fit into their mouth. Might be unsightly for a small child.
Only up the Otos if you have sufficient algae for them to eat or are willing to feed them vegetables, e.g Zuccini. Otherwise they will die, very quickly. I have had 3 in a 30G for nearly a year and they are thriving. I don't have a lot of algae in my tank but I feed zucchinI slices 2-3 times per week.
That should be fine as a mix. My tiger barbs and Otos don’t seem to notice each other.Albifrons WondrousEchelon I will look into the Honey Gourami. Thanks for the tip!
Will the Cherry’s mouths get big enough to suck up the otos, or the tetras? When I was doing my research I was looking at these, due to them all being roughly the same adult size.
I definitely do not have an issue with putting a piece of zucchinI in. I’ve seen a few videos and I think it looks cool watching the fish nibble off of it.