MagicChipmunk
I just did a water change and why is my nitrate still high does anyone know why? 25 percent water change
Check this! Depending where you live, the season, and the state of your local facilities, the water supply can change suddenly. Also its spring and here in the PNW thats when all the water lines crack and break, from shifting waterlogged soils, this can allow new pollutants to enter the supply.Check your water supply as well another poster had 40ppm from the tap that was causing issues.