All the aerators and pumps below have a good reputation among anglers and I personally like them because of their waterproof/resistant seals, switches, and the good output. Not many serious anglers are without an aerator in their fishing arsenal, they are usually attached to coolers for transporting live shrimp.
This one is designed to be used in situations where noise levels should be very low. It is very quite and recommended for e.g. raft fishing, a popular style here. On the high speed setting (above, top right stone) the battery lasts for around 30 hours and on low for around 75 hours.
Size: H-15cm, W-79cm, D-4cm
Weight: 430g including batteries (two)
Motor life: 1000 hours
This one has quite a large ceramic stone which is designed to quickly aerate the water with very fine bubbles.
Battery life: about 30 hours.
Size: H-12cm, W-4cm, D-8cm
Weight: 380g including battery (one)
Motor life: 1000 hours
A water pump, rather than aerator.
Battery life: about 10 hours on four alkaline batteries.
Battery case diameter - 104mm, height 116mm
Pump diameter - 50mm, height - 116mm
Hose length - about 3m
Weight: 1350g including batteries.
All from National