Tinyfellows Posted August 24, 2021 Share Posted August 24, 2021 I recently bought a tds meter and am currently trying to understand where the difference in my tap water and tank water came from. Out of my tap my tds is around 160 with a dkh of 0. Then when I check the tds in my nano shrimp tank the tds was 360. I have crushed coral in my substrate that puts my tank dkh ph 4. My dgh in the tank is 16 did my general hardness get so high from topping off with tap water? And would it be safe to use Rodi water to bring the general hardness down to lower my tds? If I did do this would my kh stay around the same level since the coral is in the substrate? 1 Link to comment Share on other sites More sharing options...
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