I used the tunze 3152 for many years, but recently switched to the AutoAqua Nano for my new build. I must say, aesthetically it is more pleasing but both do the job just as well.
The perfect All-In-One, Plug-and-Play Auto Top-Off solution for aquariums under 50 gallons As fresh water evaporates from your saltwater aquarium, the salt that is left behind begins to build in concentration. Auto top off systems help to restore osmotic balance in your aquarium by refilling...