Originally Posted by rocketeer I'm thinking of buying a couple of these Aquahouse pumps: http://www.reefsolution.com/catalog/...67&language=en Do those require a timer or is it built-in? Looks like it's built-in, but I wasn't sure. If they don't need a timer, not a bad deal. I have the MarineMagic 1+1 dosing pumps. They work well. Just a bit pricier than 2 of those linked above would be.
-You had me at PWM
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