Hello all, I am new to the forums, though I've been reading them for quite some time.
My first question is one I can't seem to find addressed here, or on any other site: does TDS matter if the GH and KH are in a good range?
My SoCal tap is around 180 TDS from the faucet, with a KH of 11, and a GH of 12, and a pH of 7.5.
Ideally, I'd like to reduce both KH and GH to half, or a quarter of their current values, because I'd like to keep a cherry shrimp tank. I've been experimenting with cutting my tap water with distilled water 50/50, which does indeed reduce both the GH and KH by half (while maintaining the same pH), but also takes my water down to a puny 90 TDS.
From what I've read, the majority of concern over TDS numbers have to do with whether the KH and GH numbers are sufficient, not necessarily the remaining dissolved solids? So then, does it matter that my TDS is only 90? Does it matter that my tank is planted, in terms of nutrients the plants might need as well?
Most people I see with higher GH and KH numbers also have TDS in the 300+ range, so my tap's numbers are kind of throwing my understanding for a loop.
Any help in this area would be appreciated! Thank you.