Answer:

Tuff and Domex toilet cleaners have different active ingredients. Tuff contains hydrochloric acid, while Domex bleach contains sodium hypochlorite . The percentage composition of the acid in Tuff may vary between products, but Domex bleach has a 1.5% concentration of sodium hypochlorite . In terms of similarities, both products are effective in cleaning and disinfecting toilet bowls. However, it's important to note that hydrochloric acid can be corrosive and may damage certain surfaces, while sodium hypochlorite can cause discoloration on some materials . It's recommended to follow the instructions on the product label and use caution when handling these cleaners.