This is a bucket of BRS kalkwasser that has been used lightly. The five-gallon bucket contained 22.5 pounds of powder when new. The total weight, including the bucket, is now 24 pounds. I switched to two-part shortly after getting this.

This is a war paint Homophyllia australis, formerly known as Scolymia australis, mounted on a 3” tile. It resides under EcoTech Marine Radion XR15w G3/G4 Pro lights with diffusers, and it receives ~100 PAR. Alkalinity: 8.5-9dKH, Calcium: 450ppm, Magnesium: 1350ppm