I used 1" gravel for the bottom half and 3/4 for the top half. That cost me plenty here in southern Florida. Seems like creek gravel is just about worth its weight in gold in these here parts. Now sand, we got sand, cheap. I am originally from Missouri, and it about makes me want to cry for the price we have to pay for creak gravel or good quality hay here in Naples. I guess on the flip side, clean silica sand in Mo was pretty expensive, and fresh seafood was practically unheard of.Originally Posted by mharmon0011