I had my son-in-law make me a rack to hold my 2L tanks. I've somehow increased my tanks to 12. They seem to be breeding 
Anyway I gave him the dimension of the tank and (4"), but I should have added extra space as once I painted they didn't fit. No biggie, I broke out the dremel and did some sanding. Then I realized that sliding the tanks in/out a lot would break the rack. A fellow RB diver suggested using 4" PVC cut in half, but the wall thickness would have made the spaces too close together.
Enter my printer, I made the walls as thin as I could and made them 10" long. So far so good, although it takes 14 hours per pair.
Anyway I gave him the dimension of the tank and (4"), but I should have added extra space as once I painted they didn't fit. No biggie, I broke out the dremel and did some sanding. Then I realized that sliding the tanks in/out a lot would break the rack. A fellow RB diver suggested using 4" PVC cut in half, but the wall thickness would have made the spaces too close together.Enter my printer, I made the walls as thin as I could and made them 10" long. So far so good, although it takes 14 hours per pair.
