My 180 houses 4 clown loaches, a royal pleco, an ornate and my black arowana. I was sifting through buy & sell and came upon someone selling 3-4 inch indo dats. Seeing as how my 180 feels awfully empty atm, I was thinking of buying 2 of the dats. My aro is about 8 inches and same goes for my ornate. My loaches are about 2-3 inches. The pleco is about 2 inches but it's almost always hiding. Would the dats work?