My 300 gallon aquarium currently has a 4" Silver Arowana, a 3 1/2" Gold Datnoid, a 4" Sternella Pleco, 3 small Clown Plecos, 3 small Juli Cory Cats, and a 1" Synodontis Cat. I also have 3 EBJDs that are 1" each in a small 10 gallon aquarium because I was afraid they would be eaten in the large one being so small. However, maintaining the water quality in the smaller tank is a little hard and tiring. Since my cory cats and other small fish are fine with the aro and dat, do you think my Jack Dempseys would be okay too?