[jed42]

I've been thinking about installing a Sump floating valve. I can't take the Sump out and I really don't want to drill a hole through the glass. Does and one know of a magnet attach float. That way I wont have to drill glass. If no one makes this than hell, I'll make a prototype and sell it

Jed,

[Bullet]

For an auto top off? Theres this if thats what you are looking for! And it works awesome.

Level Loc Auto Top Off Solution

[Samper]

Many of the auto top off kits on the market come with a bracket so that you can mount it to the sump. There was a gentleman here making them but I haven't been able to get ahold of him for a while and I'm having some problems with a unit.

Here are a few other options.

AutoTopoff.com
This first link looks very promising for my applications. I emailed them back and forth for a bit but couldn't ever get to speak with them on the phone. They said phone support isn't available at this time....so I didn't order anything. Customer support is a huge issue with me. Their loss.

ReefTek: Reef Relief Automated Aquatic Top Off Controller
I have used these and have three in operation at the moment. They work fine but the solenoid is sealed inside the box and that's not the brightest idea considering the heat that they can generate.

3155.000 OSMOLATOR UNIVERSAL: Premium Aquatics=

Reef Fanatic Level Controller w/2 Float Switches: Premium Aquatics