wrightme43
Well-known member
Yes use a Total Dissolved Solids meter to see if it is doing its job. TDS should be 0-10 RO membrane and just plain 0 after the DI portion of the filter.
Should we use bio balls or not... Some places they say yes to them and others say keep away. Being new to this (only one year in) I want to know if I'm doing this right or not... please help.
Thanks.
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