concreted

Hello Reefers! I'm going to make (eventually) a special piece of aquascape in a form of a tree and i was wondering is clay like this : https://amzn.to/2XvbKOq is safe after being in the oven, dry, then multiple water change with tap water just to be safe if their anything can leach. Clay...

So I've noticed a fair amount of my sand bed turning to rock. Especially around the base rock - it is as if my base rocks are growing. I pulled out some chunks and broke up some others that weren't too tough, but the stuff that is attached to the base rock is just too hard. My dosing of ESV...