PondMAX Aeration Kit PA7(This product replaced the Pondmax PA8 Air Kit) This PondMax Aeration Kit is new and improved and comes with the air pump unit that is durable, easy to maintain and has weatherproof housing. This pump sits outside of the pond with the airline tubing dropping down into the water with the air stone submerged under the water. It is quiet and efficient for a smooth operation and comes with a 1 year warranty. The PA7 can manage ponds up to 750 gallons. It