Hi all,
I've read many older threads on this and have picked up varying answers to this.
I have my pond currently reading 0.2% salinity and TDS reads 2000ppm. My EC reading is 4300(not sure what value this reads uS/cm(?)). I also use calgrit (calcium carbonate) in my filters to provide minerals/stable pH.
My issue is that some threads have said the TDS equals the salinity read (correct in my case) but other threads have said TDS also accounts for carbonates, Ca, Mg, Na. So do I truly have a salinity of 0.2% or are the other readings of carbonates, Ca, Mg, Na interfering?
Not the best with chemistry so any help appreciated !
This is the pen im using
ebay.com.au/itm/284564243173?hash=item424159c2e5:g:VRwAAOSwDeFhtD8 1
Thanks!