Let's talk about these PEUTIER floating plant corrals. I've been using them in my 50-gallon planted tank for about a month now, and here's the real deal.
The good stuff first: The variety of sizes (5 different hexagons!) is actually super useful. I use the largest ring to corral my duckweed near the filter output, and it does keep most of it contained. The EVA foam material is indeed durable - no signs of degradation even with constant water exposure.
Now the not-so-good: Like one reviewer mentioned, my larger fish (angelfish in my case) absolutely flip food out of these rings during feeding time. The rings work better for my smaller tetras who eat more gently. Also yes, plants do tend to migrate into the rings on their own - I find myself rearranging them every few days.
Pro tip: These work best when you want to create designated areas in your tank. I use one ring strictly for feeding, another for floating plants, and a third as a 'safe zone' for shy fish. They do help maintain some order in what can otherwise become an aquatic jungle!
Final verdict? Worth trying if you need plant control, but don't expect miracles with messy eaters or perfect organization without maintenance.