Actually... All the brands mentioned above are actually exactly the same product, the only difference may be the shape of the pellet and the packaging that surrounds it. All of these pellets are produced by a U.S. bio plastics company. If anything it is better to buy Canadian since Vertex is a Canadian based company.

Thank You

Very good point for sure.

Are all these brands PHA?

http://en.wikipedia.org/wiki/Polyhydroxyalkanoates

Add BRS to the list if so......

Warner marine ecobak.

Cheaper than vertex. I have heard they are all pretty much the same.

I feel it's working for me. Minimal algae.

I've gone through 2 bags of the Vertex pellets with no issues. I'm now trying the BRS pellets since they were on sale during black friday.