I have a 20 gal long with:
a dwarf gourami, 5 glowlight tetras, 4 black phantom tetras, 3 otocinclus vestius, and 2 african dwarf frogs.
My tank is moderately planted and has been running for almost 3 months now. I do weekly water changes of about 30%.
However, my substrate always looks messy. I think it's the frogs. I feed them by hand but they still miss half the food I give them. (Also my tetra think it's fun to shred the otos' veggies and algae wafers which adds to the mess). I wanted to get a bottom dweller to help clean up the mess a bit. But I don't want to overstock.
I really would like to get cories, but they need to be in a group. So I opted for ghost shimp instead who vanished overnight (and there was a very full gourami in the morning). What do you think? Would cories work in my tank?
According to the aquarium calculator I am currently at 56% stocking, and 104% filtration (but that doesn't factor in my plants).