If you haven't done so, place a 5/8"x8ft ground rod all the way down in the ground and ground the tower mast pipe. You will also want to do this with all your radio equipment. And make sure the grounds tie together to make a single point for all the grounds. Most use a ground buss bar. But there are other ways. But I would for sure ground that antenna. And also adding a good 1:1 isolating/matching balun at the antenna feed point and a Low Pass Filter at the radio end helps with RFI/TVI issues and also with common mode currents along your feed line. It takes a lot of work to have a good antenna setup that works at its best or as close to optimal as possible. But you have to take the time to do it correctly. JMHO's. Don't cheap out in this area. Your antenna system that is. And all the related parts. Again JMHO's. Enjoy your time on the radio!! And 73 abs God Bless.