I have my tubing in my sump connected to the pump, but the tubing keeps coming off the pump. I can't use a metal clamp since it's in water, but I need something to keep it on. It already almost caught fire or just burnt out my power strip day before yesterday. It has come off 2 or 3 times since. I just finished putting it on again this morning. What is a good clamp to put on this. The tubing is 1/2 inch or 3/4 inch.