If you don’t want to spend a ton of time doing maintenance, Fluval filters are the absolute best. They are worth the extra money. I have this tank in my office and it is absolutely silent. I love it, beautiful too with so many color options for lights. I keep mine on the color rotate option and it is quite the display. Highly recommend

I really like this tank and the internal filtration. I really like the curved look to the tank and how quiet it is. The lights do well for the plants I have. My biggest gripe is the price point. It would be a lot cheaper to piece together a 15g tank. I feel it should come with a heater for the price. Also the pump is very strong and needs to be baffled for most fish. Overall I i like the look and function. Makes a great office tank but probably wouldnt buy it again.

Smart design with the filtration, heater, and bubbler in the back. It more easily becomes a showcase aquarium as a result. The bowed front shape is also visibly striking. The 15 gallon Flex tank is a good choice with limited space.

Pros: -Very modern design, nice kit. -Pump is nearly silent (with the lid off) Cons: -Lid rattles with lid of.. I adjust it so its quieter, and a few hrs later its loud again. -Pumps power is not adjustable. -Lighting remote is crazy inconsistent.

I love Fluval tanks because they are so well-made, but this tank has a few flaws for specific fish and invertebrates. Firstly, the filter pump that comes with this tank is far too strong for many fish and invertebrates (I have bettas, guppies, and shrimp) and does not have the option to weaken the flow, so I had to swap it with a smaller pump. Secondly, the filter intake slots are large enough for small fish and invertebrates to fit through, allowing them access to the back filtration compartment, where they can become trapped.

The Flex 15 is probably my favorite tank of the 6 I own. I always end up dismantling the all in one kits, but not this one! This tank offers a ton of room for additional filter media (I added additional sponge and bio rings), and the light is great for growing lower light live plants-pretty much 80% of the widely available plants in the market. I did add an after market submersible light to mine and a timer/dimmer for the included lighting system. I gave this a four rating because the pump cannot be adjusted and the flow rate is really too strong for large-finned fish like bettas. I currently only house dwarf emerald danios and Amano shrimp, but I still needed to slow the flow. In addition to the extra sponge in the filter compartment, I added sponges to the outflow and it did the trick. It’s an easy fix, but Fluval really missed an opportunity to provide an adjustable flow pump. I completely recommend this tank. It was packed securely and delivered quickly. I really want the 34 gallon now!

Top cover/lid/lighting unit was warped and did not fit tightly or correctly. Waiting for customer service to resolve this issue.

I love this set up. It's great if you want all in one. The pump seems a little weak, not a ton of flow but that's easily remedied. It's super nice looking and the light is decent for low light plants.