Review on 🐠 TankFirst Complete Aquarium Water Conditioner: Effortlessly Remove Harmful Substances for Optimal Fish Tank Health by Sheila King

My ammonia and nitrates went through the roof in my 20 gallons. I used the product and tested it after a few hours and it reduced it to almost nothing. I used a little more as directed and tested it a few hours later and the ammonia, nitrates and nitrides were all zero. Fish are healthy, plants are healthy. no smell. Simply outstanding. Uses a small amount so it lasts a while. Highly recommended. You can't go wrong with this product. I will buy again.