I agree with BJJ, there is not much difference between the rubbermain tank and a custom shark lagoon., in that you are looking down on your animal regardless.
A 5' by 3' foot print gives decent turn around space for a cat shark and lots of sand surface area. Better than a 150 cause the 150 is a foot longer but much thinner. Smaller turn raidius. IMHO
Dont have much exp with bandeds though, so not sure what they need, but a cat would do fine in that type of pond. IMHO