Essjay Moderator Staff member Global Moderator ⚒️ Joined Nov 28, 2006 Messages 22,107 Reaction score 19,415 Location Teesside, UK Jun 1, 2020 #16 That unit is not one used in fish keeping so we need to convert it into the two units that are used. 119.6 mg/l calcium = 16.7 dH and 299 ppm Yes, it's hard
That unit is not one used in fish keeping so we need to convert it into the two units that are used. 119.6 mg/l calcium = 16.7 dH and 299 ppm Yes, it's hard