Eliquid Reserve 1850 Reserve by Ben Northon Arme boost ( prt vaper ) Good day, Recently my koi water keeps turning brown, I usually change 25 30% weekly or every 2 weeks but its still turning brown and its difficult to see the fishes , The filter i use is the cpf 2500 E liquide TABAC FR4 E liquides E liquides tabac KERVAPOR What caused the brown coolant color and how to fix it? Why Does Vape Juice Turn Brown and How to Avoid It Vape Green