What are the preferred brands for GFO? i do not seem to be having success running Phosban Media from TLF's. I was wondering if there is a brand or type that is more commonly used that is perceived to be a better product at removing Phosphates.
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It all comes from Severn Trent or Bayer Chemical no matter who puts their name on it. There are only a couple manufacturers in the world and I believe they are all in Germany. You may find a different grain size or some is pelletized which I prefer but its really all very similar in the end. We have used it for treating arsenic in drinking water for decades. If I cannot get it from work I use the pelletized version from BRS.

