lokii_37
New member
if its not DI there is a good chance there is something in it. I dont know if what is left over after RO will cause the cyano or not. i have headr people say when the TDS after DI reads nore than 1 or 2 they change out the DI resin filter. i would bet the RO from Olivers has more than 1 or 2 TDS. all that being said RO is still better than tap.
Nick.

Nick.