i have a red anthurum plant in a 6 inch container. when a new flower blooms the older blooms get dried &fall off
watering is once a week with 6 ice cubes as per instructions.
Certified GKH Gardening Expert
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