Lithops replace their paired leaves through a distinctive growth cycle, and watering needs to follow that process rather than a weekly habit. Observe the old and new leaves before deciding what the plant needs.
Read the paired leaves
Lithops have paired fleshy leaves and a distinctive replacement cycle. As a new pair develops, the old leaves can shrink and dry while supplying stored resources. That change should not automatically trigger a watering simply because the outer leaves look tired.
Use drainage and observation
Choose a suitable growing medium and a pot with drainage. Check the plant's stage, the root-zone moisture and local conditions before watering. A weekly schedule copied from another succulent cannot account for leaf replacement or a resting phase.
Keep changes measured
Introduce stronger light gradually and keep a record of the plant's development. If there are several plants in one pot, check whether they are at similar stages rather than treating the group as one uniform specimen. Avoid pulling a plant apart to inspect progress. When symptoms are unclear, use a specialist Lithops guide and photographs of the full plant and pot before deciding on an intervention.
Related reading: Growing Lithops From Seed: Small Seedlings and Their Roots.