Advice please

Looking at a 4ft x 3ft x 1.5ft high tank, was looking to keep rays and some top dwellers also will have a suitable size sump for filtration (if this is the way to go) was just wondering if this would be a good choice and just wanted some opinions?
Thanks Ben


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Hi was thinking maybe a couple of histrix type ray or teacups as most would call them so about 18" disc most thought that size tank would give some good swimming space


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