Hondatek
Aquarium Advice Addict
I think I know the answer but would like some confirmation. When I start up my ro unit I get a slight tds reading of 8-11. After it runs about 2-3 cups it's back to zero.. Is this because I have no back flush kit?
Hondatek said:Ok I do use a hand held tds meter but I ran it under the ro output before I tested . It must be the glass I used then . I will try it with a sealed pack of plastic cups next time I buy some . I think you are right though. Thanks