Fluval Flex 9 and 15 Gallon Review: Best Betta Fish Tank

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Fluval Flex 15 Review Fish Tank

If you look up to getting the best yet nano aquarium for your home, you will get lost in an enormous number of products. The aquatic market is fully loaded and you will not be able to tell which one is the best.

You might be looking for some specific requirements, but the search for the best fish tanks can lead to a waste of time and useless products if the research is not done right. Don’t get surprised if getting a fake one, that is a common problem when you don’t know where to search.

To stand out from the crowd, you would want a small aquarium that has it all. Definitely an original one that will meet your requirements and belief of what you’re looking at. At this point, Fluval Flex is an aquarium manufacture that wants to keep things simple. Its goal is to create a quality product, durable and yet unique enough to be the perfect accessory for any space.

Fluval Flex aquarium is the product that you’ve been looking for, with its contemporary design and the amazing aquarium kit that best fits your interests. We have tested the Fluval Flex for you.

This amazing product has everything you need to set up an aquarium and please your aquatic pets. Fluval Flex can be purchased as both, a 9 gallon tank, and 15 gallon tank, making it the ideal choice! 

Walls MaterialGlass
ShapeRectangular or Square with round corners
ColorBlack, White
StyleModern
Size Options9 , 15 and 32.5 Gallons
LightMarine 3.0 LED Lighting
Filter3-Stage Filtration
HeaterNo
Air PumpYes
LidYes
Accessories/DecorNo
Require aquarium standNo
Used asFreshwater, saltwater,
reef tank , aquascaping
Extras2 independent multi-stage chambers

Fluval Flex Overview: 9 and 15 Gallon Aquarium Kit

Our Fluval Flex Review will give you all the details about this freshwater tank. Fluval Flex 15 gallon is an amazing product that has a lot to say, and the main reason it was made, is the requirements of creating a freshwater aquarium that comes with the aquarium kit. Many people struggle with buying the tank, the filter system, the heater, the lid, etc. At this point, why not create an all-in-one aquarium.

Fluval Flex Review Fish Tank 15 and 9 Gallons

This brand has a lot of aquarium versions, one of them is Fluval Spec V. Compared to older versions of 9 gallons, Fluval Flex 15 gallon has a lot of improvements. It is bigger in size, has an extra space of 4 gallons, and it’s easier to stabilize the water. This way your aquatic pets will have more space, and the tank display will be larger than the old versions.

It also comes with the newest LED lights, and has a contemporary design, making it a modern aquarium that will not only please your pets but also enchant your living space. 

What makes this fish aquarium stand out from other brands, is thinking out of the box, with the contemporary design of the glass aquarium and the 3-stage filtration system. This type of system is something that you don’t see on other brands and is the best solution to have a superior water quality. The water in this modern fish tank will be clearer than ever, and your aquatic pets will be safe.

Another amazing thing is the 7500 K LED light that will improve the growth of the plants, and the 6 RGB  with 48 white adjustable 1450 lux LED that will enchant your aquarium with a spectacular display.

Design: What’s Included in the Box?

In general, you can’t really tell which Fluval fish tank is the best looking, as they all have wonderful designs. Although, Fluval flex 15 gallons is one of the best betta fish tanks so far. We can say that is for sure one of the best fish tanks for beginners. As soon as you get this product, you will be so amused to unbox it and discover how it looks like. 

The box is pretty big and is secured with foam so it doesn’t break. As soon as you open it, you see the full tank with the curved front and the white or black coverage (based on what color you choose). You will find the 3-stage filter system, each one packed separately.

Fluval Flex Review Fish Tank Setting up White Color

It is so easy to set up, you can simply read the manual, and is very easy. Some other key features of the design that other products don’t have are:

  • White honeycomb wrap thing on the top of the tank, and that is a detail of the design that will hide the water level. We all know that a fully filled tank is prettier, and this detail is just amazing.
  • 2-inch gap to fit the equipment. So no cable is left outside and ruins the display as many other products on the market do. There is enough space for the filters, heater, and all the cables. This is very handy to not tangle the wires and divide the space with each other.

A flaw of this tank is the fact that has a limited display from certain angles.

Filtration System

While I tested Fluval Flex, I noticed that the Fluval aquarium has a powerful 3-stage filtration system that not every product has included in. This system will keep the water clear and ensure your pets grow healthy. This equipment is included the oversized foam mechanical, chemical carbon, and biological Biomax media. 

Fluval Flex Review Fish Tank Clean Water

The mechanical filtration is done by the foam, which means that it filters the water from the leftovers during feeding time and other pieces that float in the water. The biological filter Biomax is responsible for the filtration of multiple biological excesses in the tank, including here algae and biofilm.

The chemical filter is also an important part of this system. It will ensure the removal of dangerous chemicals from the water. This will ensure not only clear water but also maintain the level of the chemicals on point and not risking the life of your aquatic pets.

The Multi-directional 132 GPH dual outputs are also part of the aquarium kit. They allow customized water flow based on the fish that you choose to keep. All the pieces of equipment are hidden nicely in the rear compartment, making it invincible for the display. This way your filter will be hidden and the display will be enchanting by only focusing on the fish and plants display.

The filter has been a big advantage for many people, and in cases of the incident, they have replaced the foam close to the pump to prevent the damage of fins or even small shrimps.

Lighting System

A beautiful part of the Fluval Flex 15 gallon tank is the LED lights that are part of the aquarium kit, and let me tell you is among the most interesting part of the setup. There is a 7500 K LED light that will improve the growth of the plants, and the 6 RGB with 48 white adjustable 1450 lux LED to create a wonderful display. The remote control is included to adjust the lights based on your aquatic pet requirements or your desire.

Fluval Flex Review Fish Tank Lighting System

There is a storm mode, night mode, adjustment of RGB lights, and also warmth. You have to turn the lights on with the power button and experiment with other modes. The storm mode has blue dominant light, meanwhile, the night mode has a warmth. You can also use a spectrum mix. You can choose for example white + blue, and create an amazing display.

In general, the white color is stronger and it will fade other lights, this is why you have to make sure to lower the level of white brightness and increase the light that you want to choose as dominant. These lights are very important not only for the charming display but also to improve the growth rate of the plants that you choose to keep in your tank.

Capacity: Fluval Flex 9 Gallon vs 15 Gallon

As we said earlier, this is among the best nano aquariums, and might not be part of the cheap fish tanks, but is definitely worth its money for the aquarium kit and the other improvements in size. Compared to older versions Fluval Flex 9 gallon, is 4 gallons larger in size and has many other improvements. 

Fluval Flex 9 Review Fish Tank With Stand

If you are looking forward to buying a 9-gallon fish tank, I have the perfect choice for you. The Fluval Flex 9 gallon is the best you can find in the market. It has the same features as the 15 gallon version, is only smaller in size as you require. It will be the ideal nano tank, its design will also make it look larger for a better display. If you are looking for a larger tank, we are happy to tell you that you can pick the 15 gallons, up to 32.5-gallon tank.

Conclusion: Who Should Buy It?

The Fluval Flex Review made me arrive at the conclusion that is among the best fish tanks for beginners. It is a sleek, modern, and unique-looking aquarium. It is amazing how the design of this tank has a compartment room to hide everything behind, making it show an amazing display. 

If you are an aquarium enthusiast, you are looking forward to setting up a freshwater aquarium or looking for a nice tank for your betta or other nano fish, this is the perfect nano aquarium. It is perfect for those who want an all in one aquarium, without worrying about other equipment, and those who would love a contemporary design on their desk.

Now its your turn. Let us know your thoughts on the comment section below for this amazing all in one aquarium kit.

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I am Mario, a expert aquarist who is sharing his knowledge with everyone.

Keeping innocent fish and aquatic plants safe and healthy is my daily routine. With my experience and my passion for aquatic life, I will advise you through the long run of keeping an aquarium.

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