Review on JOR Suction Transparent Aquarium Functions by Shelly Rozendaal

I bought them because of the plastic clip with silicone grip. It's hard to find them uncut on Amazon. This clip proved great for holding spinach or other things I hate digging out of the tank. I was fully expecting the suction cups to be junk. The clamping part works fine when the spinach is folded in half, or when I add a plastic spacer (from a mic pitcher) ie everything works fine. I was hoping that the suction cups that come with the kit would be one size fits all and that I could replace the supplied suction cups with some excellent nitrile rubber suction cups. The smallest suction cups I have are too big to fit in the rail, the supplied suction cups have a very small mushroom shaped protrusion and press against the clamp rail. If they came with a quality suction cup it would be a five star rating but they don't stick and some of them arrived stiff. I need to make additional modifications to make the clips work with a better quality suction cup.