How to Make a Greenhouse out of 75 Gallon Aquarium: A Step-by-Step Guide

If you’re looking for a new and unique way to cultivate plants, why not try turning your unused 75-gallon aquarium into a thriving greenhouse? With just a little bit of effort and some supplies, you can easily transform your old aquarium into a functional greenhouse that’s perfect for growing a variety of plants. Not only is it an eco-friendly way to repurpose an old aquarium, but it’s also a fun and creative DIY project that you can do yourself. In this blog post, we’ll show you exactly how to turn your aquarium into a greenhouse and explore the benefits of using this method for gardening.

So, grab your gardening gloves and let’s get started!

Materials You Will Need

To make a greenhouse out of a 75-gallon aquarium, there are a few essential materials you will need. First, you will need a sturdy stand to hold the aquarium and elevate it off the ground. You can either purchase a stand specifically designed for aquariums or build one yourself using sturdy materials like wood or metal.

You will also need a clear plastic cover to create the greenhouse effect. A clear shower curtain or plastic sheeting will do the trick. Use weather-resistant tape or glue to attach the plastic cover to the aquarium securely.

Finally, you will need to add some ventilation to allow air to circulate. Simply cutting some holes in the plastic cover or adding a small fan can help regulate temperature and prevent humidity buildup. With these materials, you can easily transform an aquarium into a miniature greenhouse for your indoor plants or seedlings.

75-gallon aquarium, Plexiglass sheets, silicone sealant, ventilation fans, grow lights, potting soil, seeds

If you’re considering setting up a 75-gallon aquarium, then there are a few materials you’ll need to ensure a successful setup. Firstly, you’ll require Plexiglass sheets and silicone sealant to construct the aquarium itself. Ventilation fans will provide your aquatic plants with the necessary airflow and help to maintain ideal temperatures in the tank.

Similarly, grow lights are essential for photosynthesis and to promote the growth of your aquatic plants. Potting soil will provide essential nutrients for the plants to grow, and you’ll need a good selection of seeds to sow in the soil. It’s worth noting that the type of seeds you choose will dictate the type of plants that will grow in your aquarium.

When choosing your seeds, consider the lighting conditions, the temperature of the water, and the nutrient levels in the soil. With the right materials, you’ll be well on your way to creating an aquatic paradise in your 75-gallon aquarium.

how to make a greenhouse out of 75 gallon aquarium

Steps to Convert the Aquarium into a Greenhouse

If you’re feeling adventurous and want to try something new, consider converting your old, unused 75 gallon aquarium into a greenhouse! Not only is it an environmentally friendly way to repurpose something that might otherwise end up in a landfill, it’s also a fun DIY project. The first step is to empty and clean the aquarium thoroughly. Then, you’ll need to install grow lights, ventilation, and a heating system, if necessary.

Fill the bottom of the tank with soil and choose your seeds or seedlings to plant. With some careful planning and regular maintenance, you’ll be able to grow produce and flowers in your new greenhouse all year round. Plus, with the unique shape of the aquarium, it will make for an interesting talking point and conversation starter in your home or garden.

So why not give it a go and see what kind of green thumb you have?

Step 1: Clean the Aquarium Thoroughly

If you’re thinking about converting your aquarium into a greenhouse, the first step is to clean it thoroughly. It’s important to remove any leftover fish waste, algae, and bacteria that may have been building up over time. To do this, you should drain all the water from the tank and scrub it down with a sponge or brush and a mild cleaning solution.

Be sure to rinse it thoroughly with water and let it dry completely before moving on to the next step. This will ensure that your greenhouse environment is free of any harmful substances that could harm your plants, and it will make it easier to set up any new equipment you may need. With a little bit of effort, you can turn your aquarium into a thriving greenhouse filled with fresh and healthy herbs, vegetables, and fruits, all while giving your old fish tank a new lease on life!

Step 2: Seal the Edges with Silicone

To convert your aquarium into a greenhouse, the next step is to seal the edges with silicone. This is an important step to ensure that the environment inside the aquarium is completely sealed, preventing any air leaks. Start by removing the water from the aquarium and allowing it to completely dry.

Once the aquarium is dry, carefully apply silicone along the edges, taking care to cover every possible gap. The silicone should be allowed to dry completely before moving on to the next step. This will create an airtight seal, making sure that the temperature and humidity inside the aquarium can be controlled.

By sealing the edges with silicone, you can ensure that the greenhouse environment created inside the aquarium is optimal for your plants to thrive. So, take your time to complete this step and achieve long-term success with your new greenhouse aquarium project!

Step 3: Install the Ventilation Fans on the Lid and Sides

Once you have built the basic frame of your aquarium greenhouse, the next step is to install the ventilation fans. Proper air circulation is crucial for the health of your plants, so make sure you don’t skip this step. First, you’ll need to decide on the type and size of fans you want to use.

Consider the size of your aquarium greenhouse and the number of plants you plan to grow. You can install the fans on the top of the lid and on the sides of the aquarium to ensure a steady flow of fresh air. When placing the fans, make sure they cover the entire greenhouse without causing any blockages or dead spots.

You can also install timers and thermostats to automate your ventilation system and control the temperature inside the greenhouse. Once your ventilation fans are installed, you’re one step closer to reaping a bountiful harvest of fresh, homegrown produce right from your aquarium greenhouse!

Step 4: Insert Plexiglass Sheets on the Sides for Insulation

If you want your plants to thrive regardless of the season, converting an aquarium into a greenhouse is a fun and eco-friendly way to do it. The fourth step in this process is to install plexiglass sheets onto the sides of your aquarium. This provides additional insulation to your mini greenhouse, keeping it warm and preventing temperature fluctuations that could harm your plants.

Plexiglass sheets are an excellent choice because they not only provide excellent insulation, but they are also durable and shatter-resistant. You can use a strong adhesive to secure the sheets to the sides of the aquarium, ensuring that they don’t move around or fall off. While this step may sound complicated, it’s actually quite simple and affordable.

With just a few supplies and some basic DIY skills, you can easily convert your aquarium into a thriving greenhouse that will keep your plants healthy and happy year-round. So what are you waiting for? Get started on your aquarium to greenhouse transformation today!

Step 5: Add Grow Lights and Set up the Electrical System

Once you’ve set up the structure for your aquarium greenhouse and added the necessary insulation and ventilation, it’s time to add the grow lights and electrical system. Grow lights are an essential component as they simulate natural sunlight needed by plants for photosynthesis. Burgeon your plant’s growth by using LED or fluorescent bulbs specifically designed for indoor gardening.

Consider choosing the right light spectrum for your plants and ensuring proper placement for even coverage. Additionally, you’ll need to set up an appropriate electrical system to power your lighting, ventilation, and heating appliances. Make sure to follow the manufacturer’s instructions and guidelines, including installing proper wiring, circuits, and electrical outlets.

Choosing an energy-efficient and cost-effective system will save you money and reduce your environmental footprint. With the right grow lights and electrical setup, you’ll be able to provide optimal conditions for your plants to thrive in your aquarium greenhouse.

Step 6: Add Potting Soil, Plant Seeds, and Water Them

To convert an aquarium into a greenhouse, you’ll need several steps, including adding potting soil, planting seeds, and watering them. Firstly, fill the aquarium with a good quality potting soil. Ensure there is enough soil to cover the bottom of the tank at least two inches deep.

After spreading the soil, it is time to sow the seeds. Choose seeds that are appropriate for the amount of sunlight the greenhouse will receive. Once you’ve planted the seeds, water them adequately.

Ensure the soil is moist by using a spray bottle or a watering can until the water runs out of the drainage holes in the aquarium. Remember that over-watering can damage the seeds, so it’s essential not to drown them. With enough sunlight and gentle care, the seeds will sprout, and you’ll soon have a beautiful indoor garden in your aquarium.

So, why not give it a try and enjoy the lushness of greenery in your home?

Maintenance Tips for Your Greenhouse Aquarium

If you’re looking for a unique and eye-catching way to display your plants, creating a greenhouse out of a 75-gallon aquarium is a great option. However, it’s important to properly maintain this setup to ensure the health of your plants and fish. To start, keep water quality in check by regularly testing pH and ammonia levels, and performing water changes as needed.

Additionally, clean the tank’s filter regularly to keep it functioning properly. When it comes to lighting, use LED grow lights to mimic natural sunlight and provide enough light for your plants to thrive. Finally, consider adding a heater to maintain consistent water temperature.

With these maintenance tips, your greenhouse aquarium can be a stunning and functional addition to your home.

Tip 1: Monitor the Temperature and Humidity Levels

As a greenhouse aquarium enthusiast, you’ll want to ensure that your plants and fish are healthy and thriving in their environment. One essential maintenance tip is to monitor the temperature and humidity levels in your greenhouse aquarium. This is because temperature and humidity play a critical role in plant growth and fish health.

Both factors significantly affect the way plants absorb nutrients and carbon dioxide and how fish breathe. Extreme temperatures or humidity levels can stress your plants and fish. To ensure the best results, aim to maintain a stable temperature of about 75-80°F and humidity levels between 50-70%.

You can use a thermometer and hygrometer to monitor these levels accurately. Regular monitoring will help keep your greenhouse aquarium in optimal condition, ensuring healthy and happy plant and fish life.

Tip 2: Clean the Aquarium Regularly to Prevent Algae Build-Up

Maintaining a greenhouse aquarium can be a delightful and rewarding experience, but it does require some effort. One crucial aspect of keeping your aquarium in good condition is ensuring that it remains free of algae build-up. Algae bloom can turn your beautiful aquatic haven into a murky, unsightly mess in no time if left unchecked.

To prevent this, regular cleaning and maintenance are essential. You can start by scrubbing the walls and base of the tank with a specialized algae scraper to remove any visible growth. Next, replace about 10% of the water every two weeks to dilute any remaining nutrients that contribute to algae growth.

You can also invest in a high-quality filter and ensure adequate water flow to keep the tank well-oxygenated and remove any waste. With proper care and attention, you can maintain a thriving and healthy greenhouse aquarium that will provide you with hours of enjoyment and relaxation.

Conclusion: Turn Your Aquarium into a Thriving Greenhouse

In conclusion, making a greenhouse out of a 75-gallon aquarium is a green solution that allows you to grow your own fresh produce and contribute to the conservation of the environment in a fun and creative way. Who knew that an aquarium could be repurposed in such a unique and innovative manner? With a little bit of effort, patience, and creativity, you can turn your aquarium into a thriving mini-greenhouse that will not only add to the beauty of your home, but also provide you with the satisfaction of knowing that you are doing your part in preserving the planet. So why wait? Grab your tools and get ready to watch your plant babies grow in their new aquarium home!


What materials do I need to make a greenhouse out of a 75-gallon aquarium?
You will need a 75-gallon aquarium, clear plastic sheeting, silicone sealant, a heater, grow lights, and potting soil.

Can I use a 75-gallon aquarium as a greenhouse for any type of plant?
Yes, a 75-gallon aquarium greenhouse can be used for a variety of plants, as long as they fit inside the aquarium and have similar environmental needs.

How do I prepare the 75-gallon aquarium to become a greenhouse?
First, clean the aquarium thoroughly with hot water and soap. Once dry, apply silicone sealant around the edges and attach clear plastic sheeting to create a seal. Then, add your growing medium and plants.

Do I need to provide heat for my greenhouse aquarium?
Yes, you will need a heater to maintain a consistent temperature in the greenhouse, especially during colder months.

How many plants can I grow in a 75-gallon aquarium greenhouse?
The number of plants you can grow depends on their size and the space they require. It’s recommended to start with a few plants and see how they do before adding more.

Can I use natural light for my greenhouse aquarium instead of grow lights?
While natural light can be used, it may not be enough to meet the needs of some plants. Grow lights can supplement natural light and provide the necessary spectrum of light.

What should the temperature and humidity levels be in my greenhouse aquarium?
Temperature and humidity levels should vary depending on the plants you are growing, but a general range is 65-75°F and 50-60% humidity.