Use open wire or ladder line to feed the loop, employ a widerange antenna tuner, and it becomes a wonderful multiband antenna. CONS: That much wire can be heavy, causing it to droop. It also requires maintenance since lots of things can happen to a stretch of wire that long (a 160 meter fullwavelength loop is almost 560 feet long! ).
Another solution would be to mount circularly polarized antennas on the legs below the water tank. This will cause some distortion of the coverage pattern, but may not be so bad. Towers
11. EWE Antenna 9 12. Dipole Antenna Balun 9 13. Multiband Dipole Antenna 10 14. InvertedVee Antenna 10 15. Sloping Dipole Antenna 11 16. Vertical Dipole 12 17. Delta Fed Dipole Antenna 13 18.