Tetra 753,716 Bactozym, immediate bioactivity in the filter and aquarium and improved water quality, 10 capsules (Misc.)
For many years I use Tetra Bactoyzm what I am one capsule in the two chambers of the water filter give (I have a 90 liter tank). After about 12 hours the water is milky turbid, indicating the onset of bacterial activity. But a day later, the water is