I had 2 ribbons in my life. Not shrimp safe. Typical rule, fits in the mouth it is food. Yes, they produce a TON of waste. ;SourNo experience with the Blue Ribbon so I can't say for sure. My experience was based on the fact that they are heavy eaters and as such waste is PLENTY. Water changes were frequent and nitrate was up there non the less. I regretted the purchase and it had much to do with the demise of my corals. I would add an eel to a fish only setup in a heart beat. Not a reef tank. Just my .02