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LOL imagine that the very site I sent out a few dozen of these type ATO to the guys there when I was on there all the time about 12 yrs ago. or so I would guess my coils could be found there also ? The pump is new and must have replaced the siphon ? But if you simple add some airline hose over the little vent on the gas can or cap that and make another hole for the vent then attach a section of airline to the cans vent then drill a hole in a test vial like a red sea and then glue a section of the same rigid air pipe into the vials bottom then connect that to the air vent tubing then mount that inverted in the sump at the water level line you want to maintain and connect that to the cans vent . And on the cap end you drill a 3/16 hole nd run a section of the rigid tubing to the very bottom of the gas can connect a section of airline to that and lay it in the sump . when the water drops below the test vial you mounted on the vent line that breaks the vacuum to allow the siphon to suck water from the can to the sump when water reached the inverted vial again then the vacuum is returned to the can and stops all the siphon. Its just sound more complicated then it is .. I could have made one faster then trying to explain it. Stuff like this I always have the boss to proof it and make it readable . P/M me I'll explain it better in E/m Basically all you need is some silicone a new Gas can and a test vial and airline a 36in length of the hard air pipe and something to set the can on so you can raise the water level to totally empty the reservoir .

Oh and with the siphon and not the air pump you can also us mine to dose Kalk all the time I did with every refill I put a few spoons of hydrated lime in the tank.

 

Incredible.

 

There used to be a company that sold something like you described Tangster... I want to say it was called the 'nurse' I think that is in the ballpark but might be wrong. drat. EDIT - found it - link below.

 

It's 'nurce.'

http://www.aqualan.com/products.html

 

$ 35.00 I'll build and send you one and bet you 5 to 1 it will work I and many have used them for many yrs . Great for dosing kalk 24/7 is what I used them for on smaller tanks. where i could not run water tubing ..or room for a kalk reactor.


Hey Matt I guess Nurce must have gotten one also LOL They have been around for all my life nothing new really just simple and cheap .