auto top off

Yo yo! Whats up with them ATOs?..... Salinity is one of the major parameters within our systems that requires our attention to maintain. Differences in salt mixing procedure and products aside, the one factor affecting salinity that all aquarists have to manage is that of evaporation. It...

Firstly - lets start with - I know nothing about circuitry outside of how to solder stuff together. Over the last month - I've been trying to make a circuit which I can connect a float switch, toggle switch, 9v battery, and buzzer. When the float switch turns on, the buzzer beeps every 5...

I was looking to make an automatic top off but I would rather not drill the sump and I don't want it to be powered by electricity. I was thinking about making a reservoir above the sump (which I would have to have a hole in the bottom of) and run a line to a float valve in the sump so that the...