20 gal stock?

[Bkcut10]

Have 5 black skirt tetras
4 tiger barbs
1 golden algae eater
5 guppies

I know the general rule of thumb one gal per inch of fish however, just wanted to make sure that this isn't to much. Do I have room for more?

They are in a 20 gal long tank with 2 under gravel filters and a tetra whisper filter as well.

What do you guys think?

Thanks!

 

[Mumma.of.two]

Generally the inch per gallon rule is useless. IMO you look stocked if not a little I overstocked. Beware of the barbs as they grow. They are known for being very nippy and boisterous especially in smaller tanks with less than 8. The CAE (golden algae eater) will also outgrow the tank. They can get quite aggressive as they grow and can eat the slime coats of other fish.