Assertion: diatom's use | /r/HasProperty | mixed with tap or well water
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text: The use of either all Reverse Osmosis water or blended (such as 1/2 or 1/4 mixed with tap or well water) can aid in many algae control as this allows the aquarium keeper to adjust water chemistry more from a "clean slate" approach especially where tap/well water contains high phosphates, nitrates, iron or similar elements/nutrients that favor algae.