TDS Understanding. I am confused.
I read about TDS and that a shrimp tank must have a certain TDS. What I read is TDS is "Total Disolved Solids" so it can be anything and not necessarily harmful. For example if my TDS is say 120 but I add dechlonirator or say any fertilizer then it will increase my TDS but those added chemicals won't be harmful to shrimps. I mean I can have a TDS of over 300 but it won't have any harmful chemicals for shrimps so why it is said to keep TDS on a certain level? Please explain about TDS. Thanks.