I received this companys auto top off(the double sensor) and let me tell you this product is quality ..I just wanted to share it here in case someone might be interested ..And it comes assembled ready for use.... AutoTopoff.com
Can anyone comment on the auto top off offered by Spectrapure? It works off of some kind of suction. I know NACL-H2O uses it because they reviewed it on marine depot but that was a couple of years ago.