pump aerates as well?
 

Does the price for the parts you sell, for example the reservoir pump for $20.00 include shipping? I notice that pump aerates as well, is that a special feature for that particular pump, or do they all aerate? How do you ship the parts?

It's $5.00 for shipping the pump and the aerator is a small hose that hangs outside the reservoir thus sucking air into the solution. It doesn't have to be used if not needed.
I ship small packages US Mail and larger ones UPS.