I think you guys are confused a drip system is not a wet and dry
A drip system is a auto water change when fresh water drips into the main tank and old water goes down the drain
I have been running one for over 3 years and its great I haven't done a manual water change on my tank for that time
With mine 200 gal per day drips into my main tank via a RO or HMA filter then I have a overflow pipe on my sump to get rid of the over spill