Main Drain - When installing a main drain in the shallow end of a pool, which they will be able to walk on should it be stainless steel rather than an anti vortex grille?

Fitting the main drains 2 meters apart is a wise measure to avoid entrapment, and utilizing stainless steel material that's scuff-proof is ideal for areas that will be walked on. This configuration aligns with safety concerns, ensuring that the drains can withstand the wear and tear of foot traffic while minimizing potential hazards. It's always advisable to follow best practices and local regulations when installing main drains in a pool to ensure safety and functionality.