whether 50ppm of nitrate is damaging depends on the species though. Some more sensitive species cannot tolerate nitrate higher than 20ppm I understand. I remember coming across one that couldn't tolerate above 10ppm (can't remember what it was sorry) I knew that was out for me though as my tap water has 10ppm. When I kept goldfish people always recommended under 20ppm, 40ppm being a maximum, which was difficult for me as my tap water at the time (since moved) was 20ppm.
Hope it doesn't contain salt either but a Google search would only come with what people use to detoxify nitrite (as in individual fish-keepers at home) rather than chemistry buffs. Maybe contact Seachem and ask?
Hope it doesn't contain salt either but a Google search would only come with what people use to detoxify nitrite (as in individual fish-keepers at home) rather than chemistry buffs. Maybe contact Seachem and ask?