wont use aragonite anymore


New member
after one year in my tank the aragonite turned solid this is a picture of half the tanks bottom pulled out in almost one whole piece. crazy



New member
Mine has been in my tank for about 3-4yrs, never had that problem...Not sure why, but that is a cool way to make frag plugs lol...


Premium Member
I have seen synthetic ferric oxide (GFO) do the same kinda thing. Calcium seems to bond it together. Aquaman has a point with a high alk level calcium maybe precipitating or basically bonding the substrate together. No worries it is an easy fix.