The Ghyben-Herzberg ratio gives the depth at which this kind of substance becomes polluted.
The Ghyben-Herzberg ratio gives the depth at which this kind of substance becomes polluted. This kind of substance provides the environment of limnicoid animals. Catadromous species come to this kind of environment to reproduce, in contrast to their anadromous counterparts. This substance's namesake lens can be found over atolls, which is why it is (*) potable. Excess phosphorous in environments composed of this kind of substance is the most common cause of eutrophication. This substance is mixed with another substance containing more dissolved solids to create a brackish substance, which is found in estuaries. For 10 points, name this type of substance that can be found in lakes and rivers, as opposed to the oceans or seas.
The Ghyben-Herzberg ratio gives the depth at which this kind of substance becomes polluted.
fresh water [Prompting on "water" seems dubious to me, but let's do so. Prompt on "lake water" or "river water" or "ground water"]