So then you havent had any issues with the Aqualifter? If not, I cant see how folks pay so much for the expensive pumps when the Aqualifter is $10. Perhaps the pump being cheaper made wont last as long? I cant see the dosage varying enough once calibrated to cause any issues with EI, but I havent used them yet to see for myself.

Well I'm comming up on a year now since I started using the cheap TOM AL pumps and they are still working like champs.