Freya's Finest is a mineral based bacteria powder. You can use Freyas Finest to start the cycle in your shrimp or fish tank, or to maintain a healthy bacteria colony in an established aquarium. The bacteria in this powder is specially selected to withstand low pH environments, making this a great choice when cycling and maintaining caridina tanks as well as higher pH neocaridina tanks. The added montmorillonite clay helps clarify your water by binding particles to it and keeping them out of your water column. Use weekly for best results.
I have heard great things about this line of products. Currently I am using Freya's to cycle a tank and adding 1x per week. Looking forward to using this all through the life of the tank! Came in quickly and as advertised!