Was it difficult to make? What was your experience with them?
Very little, I stepped down some PVC pipes & elbows to a really small size, then glued the end of a funnel (backwards) on the end when I was playing around with spraybars. I didn't like the results from my prototype so I stopped tinkering before perfection was achieved, lol. Custom spraybar was much more effective for my situation.
I'm sold with this filter. Problem is I can't find one in [Ebay Link Removed] Is it under a different brand now?
SunSun was the major Chinese brand name for this filter. The official American release and license is now available. It has the new trademark name of Aquatop.
So in China these are sold under the brand name of SunSun and in America they are now sold under the brand name Aquatop. They are both the same item.
TruAqua.com or even Amazon.com sells the Aquatop filter for the same price. You can still find the various different name brands as this filtered was marketed in different countries through ebay still. If you really want your filter to have the brand name SunSun, or Grech, or Perfect (the other brand names that have been used with this filter) they can still be found. Although the price is going to be about the same regardless.