I've not used anything but the BRS 1.1 ml/min dosers so I may not be of any help, but they're rock solid and great little pumps. The reason I decided upon these is redundancy. If one fails I replace one. If a 3 pump doser fails not sure how easy it is to fix anything. I tend to shy away from 2, 3 or more in one devices solely on this reason alone. But granted, all my stuff is in a fish room in my basement where lots of cords and gear isn't as big an issue.
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