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TDS = total dissolved solids.
It basically tells you the amount of minerals dissolved in the water.
A lower TDS reading is better than a high one for a reef tank.
It won't tell you what kind of minerals are in the water... it just tells you how 'pure' the water is.
HTH
It basically tells you the amount of minerals dissolved in the water.
A lower TDS reading is better than a high one for a reef tank.
It won't tell you what kind of minerals are in the water... it just tells you how 'pure' the water is.
HTH
