Question about auto-topoff units -- which one to buy?

[jefft]

I use the ATO Auto Top-off from Aqua Buys its a nice unit. I also put it on a timer that only allows the unit to have power usually when I'm there since I lost power once while I was out and when it came back on it put to much RO in the sump before the overflow caught up. Also if you run out of RO it auto shuts off after a short time.

 

[todd03blown]

Thanks everyone, I bought the Tunze Osmolator today and is set to be delivered on Friday.

 

[todd03blown]

Acroholic;215729 wrote: Main lesson I learned with an ATO is to unplug it if you are drip acclimating a coral or fish so you don't overload the system with kalk enriched water if you are also running a Nilsen.

The Tunze I have pumps quite well thru a MRC Nilsen I have, so if that is something you will do, no worries there. Just be sure to use a check valve between the pump output and the Nisen valve. This keeps Kalkwasser from backsiphoning into your reservoir.

Dave

Dave - me being so new to this hobby that post above is greek to me. I just plan to use this Tunze to topoff my tank. Do I need to do any special based on the post above?