No I didn’t explain properly, on the nopox instructions it says 2ml per 100ltr for tanks no3 under 10ppm and 3ml for over so I add now 15ml as per 525ltr1. 10ppm of Nitrates is not high at all and likely needs no intervention
2. For carbon dosing, knowing the *exact* volume isn't necessary... Just get an estimate, initially dose about 1/2 of what's recommended on the bottle, and adjust upward as needed.
@Miami Reef is a good resource for carbon dosing.
Hope that’s clearer


