My feeders usually remind me by "not sounding quite right" and if hopper not cleaned will clog.
Probably dependes on type of feed - Purina Aquamax is rich in fish oil and clogs if not checked at least annually...
Thats my experience FWIW...



N.E. Texas 2 acre and 1/4 acre ponds
Original george #173 (22 June 2002)