Floowid
New member
You are kind of stuck with a custom box since you have holes already drilled. You could look at the possibility of enlarging the two outer holes to the size you need and just using a 1/2 inch bulkhead in the middle one since there is already a hole there.
Or, if you have space, you could start over with one of the premade boxes placed to the side of your 3 holes, drill the proper holes for it, and install 1/2 inch bulkheads in the existing holes. You could then either use those holes for return lines, or plug the plumbing on the outside of the bulkhead for 3 tiny mystery caves.
Or, if you have space, you could start over with one of the premade boxes placed to the side of your 3 holes, drill the proper holes for it, and install 1/2 inch bulkheads in the existing holes. You could then either use those holes for return lines, or plug the plumbing on the outside of the bulkhead for 3 tiny mystery caves.