Still uncertain of what I want to put in my 210 once my current stock outgrows it.....Considered payara or maybe a vatf ..... I would use a 50 gallon for temporary for the 4 inch vatf..... The dimensions are 40 inches long 14 inches wide and 20 inches tall...... How long do u think the vatf would be ok in the custom 50 for before putting him in the 210