Question

What effect do calcium ions have on the water in ecosystems?

Answer 1

Answer:

It adds to the hardness

Explanation:

Answer 2

Answer: C, They add to its hardness.

Calcium is naturally dissolved in water,  it can be found in water as Ca2+ ions and causes water hardness. Comes from rocks such as limestone, marble, calcite, dolomite, gypsum, fluorite and apatite. It can also be a ph stabilizer.