Contains Lacto Bacteria, Clay, Montmorillonite, Zeolite.
Now I know there are other manufactures of the same thing that also make calcium based mineral stones but none of them are like this.
These cubes because of their composition slowly dissolve in soft water and barely dissolve at all in hard water. This gives you a slight KH reading which is very handing in a tank that has an inert substrate like sand or gravel. What does this mean for you ? well it gives you a solid PH.
So that is the first thing.
Secondly I have added Lactobacillus to these cubes to put beneficial bacteria into your tank, this helps keep your tank super clean and it also helps with your shrimps digestion. This is very important as it means your shrimp get the most out of what they eat meaning they breed better and live longer.
These cubes are meant for harder water neocaridina tanks or tanks where you require the pH to be over 7 and the kH to be 1-2. these cubes are designed to raise alkalinity by adding carbons to the water column, a sign of this in snails is they end up with pitted and eroded shells.
Dosage is different for every tank.I personally would add one to a 60L tank and see what happens to it, In soft water it will dissolve in a few days, In my neocaridina tanks I add one a week.
You will do best to use a kH test kit and see what it is you need to add.