rrogCC's, What are you aerating?
De-chlorinating water is 90% of its use and the other is to bounce the pieces of kelp & neem meal around in water for that application.
Overkill to be sure but for the raised beds being able to get 50 gallons of water ready in a few minutes is pretty nice.
I use a 80 lpi pump for 5 gallon buckets and a 200 lpi for 50 gallon barrels.
CC