Originally posted by BlackH2O
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Both Cir-Q-Late and Bru-R-Eze contain sodium metasilicate (the active ingredient in PBW) although at slightly lower levels. They do have other additives as well which should enhance the performance (matches my personal experiences). Even then, adding more product (stronger solution) should give you identical results. Not sure why you would see such a worse situation from Birko products that contain the same active ingredient. Perhaps it has something to do with the water profile you have and the additives in the Birko. I use RO, and everything else has worked better than PBW when using the manufacturers suggested dosage and temperature.
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