“Epsom salts is hydrated magnesium sulfate (about 10 percent magnesium and 13 percent sulfur).

Magnesium is critical for seed germination and the production of chlorophyll, fruit, and nuts.

Magnesium helps strengthen cell walls and improves plants’ uptake of nitrogen, phosphorus, and sulfur.” (National Gardening Association)
We add it to the Aquaponic System