CO3 alkalinity buffer is used to individually raise alkalinity with affecting other elements.
TRITON Treatments have been developed to fix specific problems commonly faced by aquarists. Unlike many products on the market TRITON Treatments are quality controlled and free from contamination by unwanted / unknown elements.
https://www.triton-reagents.de/fileadmin/user_upload/support-uploads/Manuals/Manual_CO3_EN.pdf