If i added a continuous drip system to my 75 gal saltwater what gph do you thin I would need to drip per day and will the SG stay pretty much the same with this method. I don't know if this is the right forum for this. feel free to move it.
You would need a float valve to limit the input so you don't flood. Without this control you will flood eventually. I have a JBJ ATO on my tank so it will top off with RO water from a reservoir tank when the float valve detects the water level has dropped. You could do like some people do with kalk and setup a small container (limited volume) to drip into your tank/sump. This way it is what you are talking about but not enough water to flood.