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Why Is My Cardinalis Aquarium Plant Falling Over

Updated: January 8, 2023

If you are an aquarium enthusiast, you might have come across the beautiful Cardinalis aquarium plant. This plant is popular among hobbyists for its vibrant red coloration and ability to provide an excellent hiding spot for fish. However, if you have noticed that your Cardinalis aquarium plant is falling over, it could be a sign of an underlying problem. In this article, we will explore some of the reasons why your Cardinalis aquarium plant might be falling over and what you can do to fix it.

Lack of Proper Lighting

One of the most common reasons why your Cardinalis aquarium plant might be falling over is a lack of proper lighting. The Cardinalis plant needs adequate light to grow correctly and stay healthy. If your aquarium doesn’t receive enough light or the light source is too weak, the plants will grow weak and eventually fall over. You can fix this issue by investing in a stronger light source or adjusting the positioning of the current light source.

Nutrient Deficiency

Another reason why your Cardinalis aquarium plant might be falling over is due to a nutrient deficiency. Plants require various nutrients to grow correctly, and if they don’t receive enough of these nutrients, they will become weak and start to fall over. The most common nutrient deficiencies that cause plants to fall over are iron and potassium deficiencies.

You can fix this problem by adding a nutrient-rich substrate to your aquarium or fertilizing the water with liquid fertilizers that contain iron and potassium.

Poor Water Quality

Water quality is essential for the growth and health of your aquatic plants. If your aquarium water contains high levels of ammonia or nitrates, it can cause your Cardinalis plants to fall over. You should regularly test the water in your aquarium to ensure that it’s within the appropriate parameters for both fish and plants.

If you notice any spikes in ammonia or nitrate levels, you should perform a water change to dilute the toxins and improve the water quality in your aquarium.


Overcrowding is another common reason why your Cardinalis aquarium plant might be falling over. If there are too many fish in your aquarium, they will produce excess waste, leading to poor water quality and nutrient deficiencies. Moreover, the fish can damage the plants by constantly nibbling on them, causing them to fall over.

To fix this problem, you should consider reducing the number of fish in your aquarium or upgrading to a larger tank that can accommodate the current number of fish.


Can I save my Cardinalis aquarium plant after it has fallen over?

Yes, you can save your plant by trimming off the damaged parts or replanting it in a nutrient-rich substrate.

How long does it take for a Cardinalis aquarium plant to grow?

The growth rate of Cardinalis plants varies depending on the lighting, water quality, and nutrient levels. However, on average, these plants can grow up to 20 inches tall in about 6-8 weeks under optimal conditions.

Can I grow Cardinalis aquarium plants in low-light conditions?

No, Cardinalis plants require adequate lighting to grow correctly. If you don’t have access to strong enough lighting, consider investing in a plant that can thrive in low-light conditions.

In conclusion, if you notice that your Cardinalis aquarium plant is falling over, it could be due to an underlying problem such as poor lighting, nutrient deficiency, poor water quality or overcrowding. By identifying and addressing these issues promptly, you can save your plants and ensure that they grow healthily for years to come.

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