Use a liquid test to measure ammonia, nitrite, and nitrates. Both ammonia and nitrites should be 0ppm, and nitrates should be below 20ppm. If do a water change large enough to bring the numbers down.
Use a liquid test to measure ammonia, nitrite, and nitrates. Both ammonia and nitrites should be 0ppm, and nitrates should be below 20ppm. If do a water change large enough to bring the numbers down.