Sorry not to derale this thread but-

Just out of curiosity what are we considering smaller systems? Less than 500 gallons? In the posts that mention an osmolator is better for smaller systems are we saying that the rate of flow from the pump may not be sufficient to match evaporation rate of the system? I have an osmolator on a 120 Gallon tank with about 30 Gallons in the sump. Granted system size does not absolutely determine evaporation rate but mine isn't running that often that it is limited to the rate of the pump and I would love to have a system that had this problem :lol:

I use an osmolator on a 150g setup that I have. Sometimes the sensor will become blocked or clouded over with salt creep or other stuff. After I clean it up, the pump will only run for 10 minutes then stop, which means that I have to sit there and plug then unplug the unit until the sump level is back up to regular maintained levels. Ideally it should keep up by small increments, but it doesn't always work out that way.
I think that on a smaller sump volume you could probably catch the problem sooner.

I think this probably makes up my mind for me. I just need to get somewhere, so if both devices are comparable in what they will offer me, the less expensive is the way to go. That leaves me 600 bucks for coral :)

If ever I win the lottery and can afford a Harley, I'll be buying a Ferrari instead. I'll use it to go to the LFS and pick up a Profilux :)

LOL, at least you'll get where you're going with the reliable Honda,...You can't always say that with the Harley, Just saying...:wink:

I use the exact same solenoid with a Profilux, as the GHL solenoid is only 230V, 50 hz. I switched mine to one optical sensor and one float switch as a fail safe. I have a mechanical float valve as a further fail safe.

Continuing with this derail ... FWIW, I am running an Osmolator on my 280g, and with 3x400w halides, 4x54w t5's and 2x24 t5's, there is a fair bit of evaporation happening.

But the Osmolator is defective, it doesn't shut off (it gets stuck on). In the meantime while I am dealing with Tunze service about this, I just plug it in for a few minutes twice a day and unplug it when the water level gets to the level it should be.

Point is, the supplied pump is not slower than the rate of evaporation.

One thing you can do however, is get a 12V relay from an electronics supply store, splice that into an extension cord, run it off the top up and then you can run a Maxijet (or a solenoid valve or whatever you want) instead of the suppliied DC pump. You can also buy such a relay from Tunze although I don't see it listed anywhere, but the DIY project would be pretty simple (and probably around $10-20 in cost).

Check it:
http://www.michiganreefers.com/forum...er-device.html

Hey, derailers, get out of my thread!! :)

You say that now, just wait until you are trying to figure out how to hook up the ATO on your new controller. :)

Ok, I'll shut up :)

Please done give Brad and ideas that involve him doing anything electrical over pushing a button or plugging it in.. I have seen what happens when he does wiring..

Steve