Sorry, I got interupted before I finished my thought.
What comes with the HD switch? Does it say it's OK for salt water?
The one I use is just a low amp switch, no bells or whistles. It works good.
Though a good bit more expensive the Tsunami AT1 will let u sleep at nite and go on short vacations!!!! Snail proof!! The link below is for info only . . do a google search for a discounter. I bought 1 'bout a year ago for $40. Gettin ready to buy another. http://www.northcoastmarines.com/dosepump.htm
i liek that tsunami one, but is there a way to DIY an auto top off system? i was thinking getting a top off swtich, a maxi-jet, and a 5 gal bucket, and put the 5 gal bucket under neath my tank, and when it drops it will turn on
Fish,
What you're describing is exactly what I set up. I have a Maxi 1200 in a 4 gallon bucket hooked to a float switch. A couple of things I learned were to make sure that the feed line to the tank is slightly above water, this will prevent a back siphon. The other thing is making it snail proof. No accidents yet, but the other day a snail took a ride on the switch, turning it on. Aside from that it works great. I've got to address the snail thing.
From the pics I've seen, you put the float switch inside of a piece of PVC pipe. End caps on each end with lots of small holes (smaller than the snails) drilled into the PVC.