Well, I have no idea. I would have to search the Internet just like you. I think the B is available in the US, while the A is outside the US? That according to Google searches and Amazon listings.nikm128 said:What's the difference between the sunsun 304a and the 304b, or really any of their filters that have both an a and b line?
Well not too sure about that. I see a 304A with a UV on the web.Coptapia said:The 304b includes a 9W UV unit.
Just found a Youtube video that shows the cap and it appears to be a filler cap where the UV switch goes.Coptapia said:Also the 304A has 4 media baskets. The 304B only has 3, to incorporate the UV.
Edit... Looks like it is correct that there is no UV light.nikm128 said:That's what I initially thought too, but then
Obviously a typo. Near the bottom it gets called a 304B.Cichlidude said:Well not too sure about that. I see a 304A with a UV on the web.