I have a 25 yr old aerobic pump out and spray on lawn system. There are three tanks, concrete. The middle tank is the aerator tank and it uses a shaft type aerator. I have replaced the aerator about 6 tmes in 25 yrs. Usually use a Flagg aerator for about $475 each time. It just plugs in and runs constantly. Now they are telling me I need to add a 7 amp circuit braker to protect the motor from overloads due to hair attaching to shaft. Never observed much hair on the shaft. Can/should I add the 7 amp circuit breaker without adding a whole control panel for a thousand dollars or more. Can I just wire it into the hot wire of the electric line to the aerator.

I have a 25 year old aerobic, 3 tank, pumpout and spray, system. It uses a shaft driven aerator, which I have to replace about every 4 to 5 years, at a current cost of about $500. Are the new bubbler systems I see everywhere now better, cheaper? My system works great as is though.