I went out and looked at the buddie and appears it does not come with tds meter. If you go this route be sure and get the 4 stage for water used in saltwater tanks. The 4 stage should give you 0 tds. And yes you can buy a hand held tds. Attached is my set up. How big is your tank?Ok Thanks! Do you know if the Buddie Rodi has that? And if it doesnt could i just buy a hand tds meter?