To care for your bouquet of 3 pink roses, 3 pink gerberas, and pink carnations, follow these flower care tips:

1. **Trimming**: Trim the stems of your flowers at an angle before placing them in a clean vase filled with fresh water. This helps the flowers absorb water more efficiently.

2. **Watering**: Change the water in the vase every 2-3 days to keep it clean and prevent bacteria from forming. Ensure that the water level covers the bottom of the stems to keep the flowers hydrated.

3. **Location**: Display your bouquet in a cool area away from direct sunlight and drafts. Avoid placing them near heating vents or appliances as this can cause wilting.

4. **Remove Leaves**: Remove any foliage that falls below the waterline in the vase to prevent bacterial growth. This will also keep the water clean and fresh for longer.

5. **Check for Wilted Flowers**: Remove any wilted or spent flowers from the bouquet promptly to maintain the overall appearance and freshness of the arrangement.

By following these care instructions, you can prolong the beauty and freshness of your bouquet of pink roses, gerberas, and carnations.