Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I used that many years ago, and still have it in one tank.
It sure holds up! Still the same little pellets. (I do not stir it around much, and when I redo the tank I do not scoop it out, but just vacuum it)
It does remove the KH from the water, and this allows the pH to drop.
Since the product I used is many years old, I do not know if the current product is the same. If you can get it for free, and a soft water tank is right for you, go for it! I sure would!