Just got back with all my wood screws and nails, i am going for an 8 tub rack, 18 qt for juveniles under 500 grams, i decided to go with a heavy duty 3/4" melamine setup 4 rows set for double tubs . With space to add 2 more shelfs if need be, supplies invluding hardware and tubs cost under 80 dollars, very excited for this build