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so what do you use for a top off system

i am in the process of building my RSM250 and am looking to add a auto top off
i have been topping off every other day about 1.5 gal and have been giving thought to the ato system with 2 sensors . just looking for some advise or others experience with them.
so what do you use for a top off system ?
 
I've used one of these to control a pump in a 55 gallon barrel.

http://www.reefgeek.com/equipment/Float_Switches/Level_Controller_w!_Dual_Float_Sensors_by_Reef_Fanatic
 

Brian

Officer Emeritus
Officer Emeritus
I use a double float switch from www.autotopoff.com. I have it hooked to my 55g drum and Kalk Reactor.

I use my Acjr. to give power to the switch for 5 minutes every 6 hours in case something goes wrong, it's not constantly running.
 
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