Our CTO are manufactured with high purity coconut Shell activated carbon. You will find our wide range of lengths, diameters, and micron range an exceptional cost-to-performance value, making CTO filters obsolete by comparison. With high performance, great dirt-holding capacity, and the absence of carbon fines, you will soon make the Indo Soft series your carbon block of choice.

Available In sizes: 10 “ X 2.5” , 20” X 2.5”,10” x 4.0” and 20” x 4.0” (Jumbo) with ID number > 800