Try the 30mm 80 deg Chinese clone. See the Andrews version here:-
Andrews 80° UltraWide (UW) Eyepieces
http://www.andrewscom.com.au/site-section-10.htm
Probably buy the 20mm type. You just unscrew that barlow lens and it becomes the 30mm type, is my understanding.
Your scope is an f6 I expect. For a cheap eyepiece, I think you'll find the view quite exciting. I did when I moved from the standard GSO 26mm Kelner (?) to this 30mm 80 deg eyepiece. I still use it regularly in the C8 for public viewing. At that price, I guess there might always be a few duds shipped? Query your supplier if you are not happy with it.