I need some quick help, tried a search didn't find what i was looking for. Here in the northeast specifically Mass. How deep should i aerate 2.5"? I have a 19inch bluebird aerator and it has 4 plugs across. Should i go over it twice or no? Can i run the engine on low throttle and still be ok as long as it doesnt stall? I booked it for tomorow morning since it is my only spare time all next two weeks so i need some quick help. thanks in advance guys.