If you want to know the actual ppm burden, use this calculator: https://www.translatorscafe.com/unit...-conductivity/
In the US, it's likely that you have a .5 conversion model (would be on the mfg website). This will understate actual ppm. The calculator will give you actual ppm by inputting the 500 reading and using the 700 conversion.
I have an electric-conductivity meter included on my filter for my discus tank. I dont know how accurate it is. I have a Fluvel G6.
Thanks for the link- Ill take a look.
180 g. low tech w/ wild South American cichlids, corydoras eques, and African Congo riverine tetras.
60 g. low tech w/ F1 Alenquer pair /Stendker "Tefe" discus and wild Altum Angels
30 g. low tech w/ Wild Tucano tetras
30 g. low-tech African Biotope