I have shrimp as well as corys, snails and other things that enjoy nibbling. They love the marimo moss balls and have loads but I wanted something a bit different for them. I saw these and debated it for a while then decided to give it a try. Within seconds of them being in the tank some shrimps had discovered one while one of my corys was pecking away at the bottom of the other. I have one in the still area of my tank, one in the air flow and one in between and they are so fun to watch bobbing about. They were delivered a day later than expected, purely due to Royal Mail, so I was concerned about the condition but they are super healthy and were still really damp thanks to great packaging. I was also worried about the “string” and if it would make my tank look messy but it really is super hard to see unless you are up close. Great additions to my tank and I expect I’ll be back to buy some more.