I have some PVC pipe I would like to cut and place in a tank for a hiding spot. How should I attach them together ( think honeycomb design )? I don't want to use anything that could harm my fish.
All of the water that I and my family drink and my fish swim in comes through PVC pipe that has been glued together with PVC cement. I would just let it cure for a couple days and then wash it well before putting it in your tank.