Botanicare® Clearex® Salt Leaching Solution 5 GallonClearex salt solution is common cause of crop failure can be traced to the buildup of nutrient salt deposits in soils or soilless grow media. High salt concentrations in the soil solution cause a shrinkage of plant cell protoplasm away from the cell wall as a result of osmosis. This condition, known as plasmolysis, can eventually lead to irreversible wilting.