Periodic Products LLC CUL-ULT-1 CuLator® Metal Eliminator Ultra PowerPak 4.0 12 per case. CuLator Ultra PowerPak 4.0 removes and eliminates stain-causing metals in swimming pools to non-staining levels. CuLator Ultra PowerPak 4.0 removes 4 ppm total dissolved metals from pool water, which prevents pool staining and water discoloration. It is perfect for pools with a lot of metals, larger pools, pools on well water, pools that have had a copper coil heater “blow out” and commercial pools. CuLator Ultra PowerPak 4.0 has four times the power of CuLator 1.0.