RC上Randy有明確的指出
iron base的吸附劑會導致Ca沉澱
"it appears that ferric ion (Fe+++) may help initiate the precipitation of calcium carbonate. Such ions may be added directly in some products, and can be released from iron-based phosphate binders such as Rowaphos, Phosban, and Phosphate Killer"
aluminum base並沒有提到