Fluid FX Tank 20 Review (2025)

You know how everybody’s got a way to get you to take your workout to the next level, and then you excitedly read about what it is and it’s just something basic, like dumbbells or a treadmill? 

Well, in this FX Tank 20 review, we’ll tell you how to really take your workouts to the next level. This is an aqua bag and it’s designed to push your limits by creating instability for a different type of workout. 

Unlike your traditional weights, this bag responds to your every move, which makes it perfect for everything from dance-inspired exercises to high-impact strength training. 

Sounds interesting, right? Let’s see what this bag is about!

Product Reviewed

Fluid FX Tank 20

• Weight Capacity: Adjustable water weight up to 44 lbs (20 kg)
• Dimensions: 30 inches x 8 inches (76 cm x 20 cm)
• Material: High-grade inflatable PVC, 100% leak-proof
• Body Weight Capacity: Withstands up to 220 lbs (100 kg)
• Handles: Two heavy-duty, double-stitched neoprene handles
• Deflation: One-click push valve for easy deflation and packing

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The FX Tank 20 is an interesting twist on the traditional sandbag. This 44-pound aqua bag is versatile like you wouldn’t believe. Yoga, strength training, bodyweight workouts, it can do it all and more. The water weight moves with your body, which requires you to stabilize your movements, and that can result in a more effective workout. 

It’s made of high-quality PVC, it’s 100% leak-proof and highly durable. The FX Tank 20 also comes with 2 heavy-duty neoprene handles, plus the portable design is a huge bonus; deflating is quick and easy, and you can store or transport it without hassle. 

Another perk is the 5-day Welcome Workout Series, which is a great starting point for those that are new to water-based workouts. One minor drawback (if we can even call it that) is the learning curve. If you’re new to this type of training, the instability will feel awkward at first and you’ll need some time to adjust to the movement of water. 

Who and What Is the FX Tank 20 For?

The FX Tank 20 is excellent for pretty much everyone because it’s so versatile. If you’re a fitness enthusiast, you’ll like how the shifting water forces your core and stabilizing muscles to work harder, and it may even help you build strength and muscle (however, less than by using stable weights), and balance. 

Yogis and gymnasts will like it for the low-impact nature of water-based training, which makes it the perfect tool for flexibility and control without risking injury. Basically, there’s hardly anyone that won’t benefit from instability training. 

Home workout fans will appreciate how easily the FX Tank 20 can be adjusted and packed away. It’s also good for people who are recovering from injury or want exercises that are gentler because the water’s instability is challenging, but doesn’t have the harsh impact of traditional weights. 

Who and What Is the FX Tank 20 For?

The FX Tank 20 gives a unique twist to traditional workouts. Let’s break down how it performs across some key areas. 

1. Versatility

Versatility is one of its best features by far. Whether you’re doing strength training, yoga, or balance exercises, the shifting water weight makes each movement more engaging. The adjustable water capacity allows for tailored resistance, so it’s suitable for all fitness levels, and even elders. 

2. Ease of Use

This concept might be new for some, but generally, the Fluid X FX Tank 20 is very easy to use. It comes with an air pump and a Quick Start guide, so setting it up is a piece of cake. 

3. Portability

It’s easy to deflate, and once it’s deflated, it’s compact and you can store it anywhere. The one-click push valve makes deflating and packing easy, which is perfect for people who need equipment that can travel with them. 

FX Tank 20 Alternative

REP Fitness Stone Sandbags

If you want an alternative, one of the best ones are the sandbags REP offers. These are slightly more expensive and they’re better for traditional strength training, like Strongman exercises, cleans, presses, and squats. 

They’re available in 50, 100, and 150 lbs capacities with triple-reinforced seams for durability. Unlike the FX Tank, REP’s sandbags won’t provide as much instability, but their rugged build makes them excellent for high-impact workouts. 

FAQ

How does the FX Tank 20 compare to traditional weights?

A water tank workout is a completely different workout experience compared to traditional weights. The water inside the bag creates instability and forces your muscles to engage more to keep you balanced. This makes it ideal for improving core strength, coordination, and overall stability.

Is the FX Tank 20 suitable for beginners?

Yes, but there’s a learning curve because of the instability from the water. For those that are new to aqua bag weight training, it’s better to start with less weight or gradually increase the water weight because the weight will feel heavier if it’s coming from water, so you don’t want to go crazy right away.
Also, don’t forget the included 5-day Welcome Workout Series; it’s a great resource for those new to this type of training.

Conclusion

The FX Tank 20 isn’t just your regular, everyday piece of fitness equipment; it will freshen up your routine. With its responsive water weight, every move you make demands more from your muscles, so each workout you use it for will feel more dynamic and engaging. If you want to step up your fitness game and move away from the ordinary, traditional workouts, this aqua bag is just what you need. 

Do you have experience with aqua bags? If you do, what do you like most about this form of training? If you don’t, what’s stopping you from giving it a try? Do you have some other, not-so-traditional pieces of equipment to recommend?

References:

1. David G. Behm, Juan Carlos Colado Sanchez, “Instability Resistance Training Across the Exercise Continuum,” Sports Health 5, no. 6 (2013): 500–503.
2. Evi Wezenbeek, Luna Verhaeghe, Katrien Laveyne, Lieze Ravelingien, “The Effect of Aquabag Use on Muscle Activation in Functional Strength Training,” Journal of Sport Rehabilitation 31, no. 4 (2022): 1–8.
3. Mostafa Ahmed Abd Alrhman Alagory, “The Effect of Torso Stability Exercises Using the Aqua Bag and the Bulgarian Bag on Some Physical, Skill and Mechanical Variables of Handball Players,” Egyptian Journal of Sports Kinesiology 2022: 10.21608/EJSK.2022.143238.1141.
4. Shuho Kang, Ilbong Park, “Effects of Instability Neuromuscular Training Using an Inertial Load of Water on the Balance Ability of Healthy Older Women: A Randomized Clinical Trial,” Journal of Functional Morphology and Kinesiology 9, no. 1 (2024): 50.
5. Stephen C. Glass, Kamryn A. Wisneski, “Effect of Instability Training on Compensatory Muscle Activation During Perturbation Challenge in Young Adults,” Journal of Functional Morphology and Kinesiology 8, no. 3 (2023): 136.
6. All Photos made by Torokhtiy Media Team