We bought a float switch for the sump of the 125g to make an ATO and so I was shopping around for a dosing pump and found this one [ame=http://www.amazon.com/gp/product/B0002DH5JE/ref=oss_T15_product]Amazon.com: Aqua Lifter AQ-20 Dosing Pump: Kitchen & Dining[/ame] Any one have opinion on that one?