I have a couple of small pumps (about 300 gallons per hour) of the brand Garden Treasures. I believe I purchased at Lowes. Over a year or so the pump impeller tabs become worn. These connect the impeller to the rotor. Is there a site to purchase new impellers? I tried using silicone type III; filling the ID of the impeller where the rotor fits. After letting cure completely and then testing, the silicone failed. Or should I get some good epoxy glue?