Considering ATO

[sphelps]

Originally Posted by molotov

I plan on using one of these.

http://www.conceptaquatics.ca/index....o-top-off.html

No solonoids, no pumps, no electricity, just plain physics. I can't see there being anything more reliable, simple and straight forward. Of course you'd want to have it plumbed to a reservoir. I cannot see anyone plumbing an ATO to an endless water supply.

Manual floats are less reliable than electronic. Electronic has endless capabilities for redundancy and safety back-ups. Salt creep alone is enough to keep a manual float from closing.