Sulfates would generally not cause problems, especially in High Tech tanks with their inorganic substrates.
However, it might cause trouble at high dosages in a tank with a potting soil substrate, which is usually quite anaerobic. Some sulfates would migrate into the soil and could be converted to H2S. The result might be inhibited plant growth.
Equilibrium might be fine for 99% of tanks, but the El Naturale tanks would be the most vulnerable to potential H2S problems. Calcium chloride (CaCl2) doesn't have the potential downside of a product that's loaded with sulfates. |