Hey there, just thought I would chime in here. I grow DWC and to had beneficial bacteria and still had problems with root rot. The product I use and highly recommend is "Z9", its made by a company called Flying Skull. It depends if you are living in Canada or the USA, cause they make a slightly different one called "Z7" for the USA. Anyways I am not affiliated with this company nor have been asked to promote. After using this product all my slime issues have gone, as long as I continue to use Z9! It also stabilizes the PH and keeps it there for weeks. So if you are looking for an alternative, give it a try.