Review on API Freshwater Aquarium Treatment 16 Ounce by Jamie Smith

I recently started using this in my son's 15 gallon aquarium and measured it with a pipette as it is a small aquarium. I will say my plants look good. Don't think it's just that because I also use Thrive for nutrients and substrate (nutrient) tabs. What worries me is that two fish have died since I started this two weeks ago. This is a healthy fish that I have been eating for about 6 months. And I'm sure it has something to do with it. I gave this 3 stars because I understand using it in a smaller tank. It can be more effective and less toxic in larger aquariums. Maybe other people in similar situations have had different experiences. I dosed as directed and stopped using after the second fish died. Personally I would recommend this to anyone getting a planted aquarium with no fish.