Hi, I replaced mine on fluval 305 with eheim 16/22 mm tube with no probs at all, just choose the correct size and you should be fine,just make sure the nuts runs freely over the tubing . Good luck
Just found this post and thought I'd update it. I replaced the Fluval hose with Eheim silicone tubing, and used 2 Eheim installation sets (complete intake and spraybar set) which I managed to pick up for £10 each from my LFS. Works fine