I no longer run it as a SIP. The link in my signature for shed conversion is what I run now (but with 2 beds now). I use blumats connected to gravity fed rain barrels. I still have the SIP setup for the beds with the fabric bed over grwo stones, but I added a drain hose so that if for some reason the blumats fail and begin nonstop dripping, it can't overflow. I've been running it this way for the past few years. When I check on my plants, I rarely worry about water now days and never need to manually water them.