I've also been using the Aquadevices float switch for about 2 years with
no problem. I'm using it in combination with a IKS Aquastar Vario
dosing pump:

http://www.iks-usa.com/pumps-vario.html

Which is expensive, but pumps slowly, and uses a very high quality
rubber tube/roller system.

One small warning, if mounting the float switch in the main tank (which
I do) or in a sump with snails, make sure the float switch is far enough
away from the tank walls so that snails won't jump onto it (causing the
float to stay down, causing the tank to overflow). Since snails can
piggyback on each other, you really need 2-3 times the distance of the
biggest snails in your tank.

Also, I purchased metal brackets, super-strength double sided sticky
tape, and plastic ties at Radio Shack which I've used to mount the float
sensor. See here for a picture of my old setup:

http://www.benslade.com/pictures/200...lveReduced.jpg

Ben in DC

(append 030516 to the subj to bypass spam filters)
"It's the mark of an educated mind to be moved by statistics"
Oscar Wilde


BSackamano wrote:
I've been using this one for nearly 2 years with no problems:

http://www.aquadevices.50megs.com/order1.htm


"Timothy Tom" wrote in message
om...

I know that I have seen an online retailer who sells water level
controlled switches which consist of a tube-like sensor which sits in
the sump which is connected via airline tubing to a switching module
in which you can plug a pump. Does anyone know where to find such
switches. P.S. I know that there are electric level sensors, but I
need the one using airline tubing between the sensor and the switching
module.