Advantages Shrimp safe. Kintons Quantum Clear is a supreme quality, high activit, synthetic filtration resin particular selected for sensitive aquarium environments. Kintons Quantum Clear contains huge numbers of mesopores and macropores suited to absorption of a wide range of organic pollutants wih zero impact on trace minerals and pH . Power kintons Quantum Clear will remove stains dissolved organics and toxi gases in marine, brackish and fresh water systems. it will outperform carbon in many environments and is more economical because it can be regenerated . It turns brown or shades of yellow indicating exhaustion and need for regeneration. It is regenerable over and over again for a minimun of 2 years in normal use.