Is This Tank Big Enough For Multies Shell Dwellers

[bae1994]

its 19 inches long by 12 inches front to back by 15 inches

and 15 us gallons

with a fluval 4 + filter

is it big enough

and any other tips would be apreciated

 

[bae1994]

ime pretty sure it is but i ,may be wrong is this the right section