Rowaphos and Phosban are not really the same (although both are better than aluminum or ceramic media). I'm firmly of the belief that Rowaphos is superior. Read this Adobe Acrobat document http://www.rowausa.com/pdf/Rowaphos_...est_Report.pdf
Sometimes we expect too much out of these products. Phosphate removers can only remove Dissolved Inorganic Phosphates. The only way to remove Particulate Inorganic Phosphates is via skimming. We cannot touch the Dissolved Organic Phosphates nor the Particulate Organic Phosphates.
It is necessary to remove as many Phosphate inputs as possible. I.e. use only RO
water, don't use prepared foods, soak the ingredients used to make blender mush in RO
water to remove as many Phosphates as possible, don't use additives, etc.