Another good point Kanj. Not only do the wick and coils (generally) last longer it is MUCH cheaper to rebuild them. It costs me about ten cents to rebuild my genny. Also now that I've cut my teeth on a genesis I've started rebuilding all of our tanks, except the cartos obviously. I had a little rebuilding party the other night, rebuilt 2 Vivi Nova's, 2 Vision clearos, a Vision Eternity (still haven't used any of the pre coiled wicks it came with), my AGA and my IGO. Rebuilding the lot probably cost me less that replacing even one Vivi head.