I am confused, there are some people who claim that silicone tubing is the worse type of tubing to use with CO2 systems. However many online dealers (http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=9933&N=2004+113779) and co2 sites (http://www.qsl.net/w2wdx/aquaria/diyco2.html#3) recommend the use of silicone tubing. So I would like to inquire on what type of tubing you use (silicone, vinyl, other). Also any links containing information the differences would be helpful. Thanks.