Ok im waiting for heater to get here so i can test it. I got a ziploc tub i believe its airtight so i might need a few holes, unless i can take out the sealer on the lid. I just got that one because it had 4 latches on the lid.
Well i got my uth in and its too big for my tub i got the 50-60 gal. Heater which covers too much. Will petsmart exchange it for a smaller size without a recipt?