Just to answer a few of those questions I didn't read before posting 😳... Our 20 gallon tank has 6 cherry barbs 2 original and 4 raised from fry in the tank. As well 3 oto's
Ammonia is 0
Water temp - 75f
In that tank we have a i 10-30 gal
filter running at about medium
We are currently feeding them tetra tropical fish flakes
I do a 20-30% water change every other week during this time I am vacuuming the rocks and substrate the oto's take care of any algae so that help a lot.
New to the fish thang