inTank Media Basket for Fluval Flex 32.5 | Fluval Flex 123L

The original filter lets the water bypass too much and creates very poor filtration. I feel like these filter upgrades are a must for the Flex. They are made with precision and allow for proper water flow through the media compared to the original. As a plus it makes my tank cleaner and easier to maintain because i have an area to pre filter with filter floss. Highly recommended product.

I have 2 FluvalSmart flex 32.5 and used this on both tanks. One tank is fresh water and the other is saltwater. This product works great on both. It is a great way to add your own biological media and make the filter more productive. This company ships quickly and product arrived with no damage and well packaged.

ordered 2 direct from Intank as all UK suppliers i tried were out of stock. after paying the import duty the cost was around the same as buying from UK. Item is well made and fits perfectly.

I actually had the first prototype of this cartridge from Intank. The Fluval Flex 32g tank is amazing, but the sponge system included is messy and inhibits water flow. It also causes a 4-5 degree temperature spike in water temp from the pump and lack of water flow. (From room temperature). After installing dual InTank systems this has dropped to 2 degrees for me. Cleaning the Fluval system is messy and time consuming. Intanks system makes media/floss changes a breeze. The water is crystal clear and water flow / movement is amazing. Remember to clean you motor system monthly and you will enjoy the tank. Lastly because Of the quality of the water with the right floss(InTanks) / stones and carbon.(chem Pure Green) you can keep a nice number of fish in the 32g tank. Enjoy

This product is a must have replacement for the stock filter block in the Fluval Flex aquarium. In setting up my new system, I have fought with a rough initial cycle and cloudy water for a the last few weeks. I received this product 2 days ago and my tank has made significant improvements since it was installed. I highly recommend this product. I also have placed an order to upgrade the filter media in my BioCube 32.

what a differance ,from the filter block .better flow ,pump area is much cleaner .the product is awesome . Highly recommend it .

These are absolutely perfect so far...they have been in my tank for about 10 days now. I have had this tank for well over a year - first as a freshwater tank and more recently as a saltwater reef/fish. I had always had a struggle with the flow stream and bypass of filtration ( with and without stock filtration) and just happened upon the InTank webpage a few weeks ago. So glad I did - my water is so clear now and am already super optimistic my struggle here is now over. Thanks InTank wish I had found you sooner