Polyplan actively participates in the regulations in its fields of action. For example, Mr. Bruns is significantly responsible for the development of the new design calculation of pools with biological water treatment of the FLL directive. The computational model created in this context captures the actual dilution processes in a pool for the first time. Mr. Frehse is involved in the development of the new FLL directive for private swimming ponds. By participating in the Technical Committee of the DGfdB (German Society for the Bathing) we also get involved in the standardization of Din baths and see ourselves as a technical link between the two types of baths.