i have a red anthurum plant in a 6 inch container. when a new flower blooms the older blooms get dried &fall off

Question

watering is once a week with 6 ice cubes as per instructions.

Answer 1

These are not designed to stay in these containers for too long. It will be best to repot them into bigger containers, and care for them as you would a larger plant.

This article will give you information on the care of an established plant: https://www.gardeningknowhow.com/houseplants/anthurium/repotting-anthuriums.htm