SCIFI_3D_zoo
New member
I personally bought 3/4 and 1/2 inch not sure what to use. I thought 1/2 would be easier to cover up on the bottom with sand. I flexed the 1/2 at the store too and I think it's personally strong enough to hold up a tower of rocks. It looks like Paul used 3/4 to me... but it would be interesting to hear his take.