ATO Question

[Deefish714]

Got a 41 gallon frag with a 15 gallon sump. All these numbers are filled without rocks sand etc. I have 50 lbs of live sand and 50 lbs live rock. I'm looking to purchase a top off. My tank seems to evaporate approximate 6 gallons a week. Ive been looking at the Tunze USA 3152.000 Automatic Top off Nano Osmolator for Aquariums Under 55-Gallon. What does everyone think about this. Will it handle my frag tank? I've read reviews with people over the total volume I have in my tank without sand rocks etc and they were running no issues. Just would like to confirm before I purchase it.

Thanks in advanced

[mcgyvr]

Both tunze ATOs systems have the same pump..
The nano just has a single float switch/5 minute timer and the other has an optical sensor/backup float switch..

Either will work on any tank.. Its just if you want the "better" sensors or not..