SUPERVIT TABLETS A 50 ML/36 G

My first order didn't arrive from Amazon delivery and never been delivered without any refund that they promised. I will have to follow up again for the 3rd time. However, my second order got delivered the next day. So here goes my review. Unlike someone mentioned that the tab doesn't stick to the glass if broken in half, it does stick in any amount if you press steady and hard with your fingertip. Out of one tablet, I was able to stick on the glass for all my 5 to 10 gallon 10 nano tanks. It was pretty easy to break the tablet. One whole tab would be way too much for my tank that is holding 5 kubotai rasboras, 6 CPDs and 5 Amano shrimp. Unlike what I expected, the tablet quickly loosened and started to falling down and moving along the current. My number one concern about my tank is the water being polluted. So, the way it makes mess easily isn't ideal. I didn't observe that the fish actually eat not directly from the tab but having a bite crumbs that got off of the tab. It could be good for community tank that holds many fish in large volume of water. In that case, you could stick the tab on the top 10% in elevation to cover most of the water column with the food. I wouldn't recommend it for nano tanks unless you don't mind break one tablet into multiple pieces every time.