i grew english cucumber for my fish this year. they are like normal cucumbers but easier to grow and have a tough skin. they can easily go through store bought cucumber but the english one's skin lasted about a week after everything was eaten.
generally there are no cucumber reamins. everyone in my tank likes it, especially my bristle nose. he has a very few bristles and they are short. i really think the ones with big bristles are ugly. i can't stand to look at those.