Can it be used in combination with commercially available laundry detergent?

It can be used in conjunction with commercially available detergents.

However, chlorine-based detergents cannot be used together.

Also, if you use regular soap detergent, black mold will grow in the washing tub due to its nature, but Rinenna has a strong ability to remove dirt, so it will also remove dirt from the washing tub and prevent it from getting on your clothes. It's rare.

If you are using a soap-based detergent, we recommend that you first clean the washing tub before using it.