I have several 5,7 and 10 gallon pots and I don't really have anyway to submerge them. I suppose I could try a trash can but then I am not sure I would be able to fish it out once the pot is water-logged. I am hoping that, in the long-term, I can find a way to make the potted plants less hospitable to worms. It really is strange - I have had potted plants for decades but it has only been for the past 3 years or so that I have run into this problem. It makes me wonder if it wasn't due to the soil I purchased....