That worked. I used the self tapping screws that had a rubber washer on them and also added silicone.

Now I have some Fatheads in the tote and I want to see if I can get a spawn going. Water temp is 52 so I need it to come it to come up a bit. Can I just use 6" lengths of 2" PVC or do they need one of the ends blocked off to be more comfy?