Answer: Your plant may not be happy in its present location. Make sure it is getting bright light and is away from drafts from heaters or open doors, etc. They like moist but not soggy wet soils. I think I'd try once more to repot it in fresh potting soil (make sure your container has adequate drainage holes) and set it in a bright location away from drafts. Allow the top inch of soil to dry out before watering and when you do water, immerse the pot in a large container of water (or the sink) until it is thoroughly saturated, then allow excess water to drain. Don't water again until the top inch of soil is dry. I think this will help your Acanthus grow healthy new leaves. Best wishes with your plant!
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