This is sturdily constructed of thick plastic, and made with a channel that traps air underneath to assist it in staying up on the surface and not be easily submerged. It seems unlikely to warp with use. I feed loaches that like to fling themselves over the edge of feeding rings - so I found that lightweight rings weren't working as the fish would just remain draped over them, which released the feed over the whole surface of the pond. Feeding rings may not be essential per se, but they are a convenient way to get a look at most of the fish on a regular basis as well as helping more accurately gauge the amount of flake food being fed. I'm very pleased with the quality and design of this ring.
Rating:
[5 of 5 Stars!]