These are the cartridges that are used in my waterfall filter that I have in my 20 gallon long turtle aquarium. I think they work very well!! The waterfall filter does require two cartridges though and I just recently got it so when I went to the pet store to get replacement cartridges and saw they were $13 for one box of 3 filters I knew I needed to find another buying option. I was thrilled to find these at under $3 a box! Even though there is a minimum order of 2 boxes I’m still way ahead! I bought 3 boxes for less than I’d have spent on just 1 box! So needless to say, the value is excellent! I also have been very happy with their performance. Turtles are very messy animals, even when they’re babies like mine. Her tank has never been even a little bit cloudy aside from the first 2 days after setting up the tank for the first time, but that had nothing to do with the filter, it was new tank syndrome and once the good bacteria developed it cleared right up and thanks to these filters (and cleaning of course) it’s staying that way. It was suggested to me to replace the filters every 3 weeks, but after a week and a half the cartridges are still working perfectly. At 3 weeks I’ll evaluate again. For turtles replacement will be more frequent, but if you have less messy animals or fish you probably won’t have to do it so often. So overall, I am extremely satisfied with my purchase and definitely recommend 💖 Read more


These filters work well to keep my turtle tank water clean and odorless. I have been using them for a couple of years and if changed regularly, water stays clear and fresh. Read more
Not the same packaging as the old filters, nor is the quality good Read more
I feel that if a product works well then why change it??? I've been a custom for a few years now and it's nice to know that when it's filter time for Andrew my turtle I know for a fact that I bought not only a trusted and proven product, but that I never have to worry about a filters quality being cut in half and the prices double in the same statement..... It's worth every star given. Quality product, for a really fair price. Read more
I've been using Tetra ReptoFilter Cartridges in my turtle tank for quite some time now, and overall, I've had a positive experience with them. These cartridges have proven to be efficient in keeping my tank clean and maintaining a healthy environment for my turtle, JJ, along with seven other smaller fish. One aspect that stands out about Tetra ReptoFilter Cartridges is their reliability. The filtration system effectively removes debris, waste, and impurities from the water, ensuring a clean and clear habitat for aquatic life. This is crucial for the well-being of turtles, as they are known to produce a significant amount of waste. I appreciate the ease of use of these cartridges. They are simple to install and replace, making maintenance hassle-free. Additionally, they fit perfectly in my Tetra ReptoFilter, providing optimal filtration performance. One incident worth mentioning is that I received a cartridge that arrived broken. However, I contacted Amazons customer service, and they promptly replaced it free of charge. This level of customer support was commendable and ensured that I remained satisfied with their product. In terms of durability, Tetra ReptoFilter Cartridges have held up well. They maintain their effectiveness for an 2-3 month period before needing replacement, which is cost-effective in the long run. Overall, despite the hiccup with the broken cartridge, my experience with Tetra ReptoFilter Cartridges has been positive. They efficiently keep my turtle tank clean, and the excellent customer service provided reassurance of the brand's reliability. I would recommend these cartridges to any turtle or fish owner looking for a dependable filtration solution. Read more
Used for a turtle tank, filters the water well, lasts about a month and a half before needing changed. Water is clear and turtle is happy and healthy. Product quality is good, they fit and function just right. Read more
I buy these for the family pet turtle they work well and need to be changed every 6-8 weeks. The only con is the box only comes with 3 per box and the filter requires 2 with every filter change. So you have to purchase 2 boxes Read more
Maybe I'm daft, but I've been using these things for about 6 years now (love them - they keep my 3 striped mud turtle & stinkpot/musk turtle tanks nice & clean), but I just realized that those clips on the top of the bags actually come off. What their description doesn't say is that you can take the plastic "skeleton" insert out, turn the whole thing inside out & wash it. Do this over a bowl though, the little black carbon pellets will come out - which means you can replace those & save a ton of money. Instead of replacing the whole filter every 4 weeks like they suggest, wash it out, and only replace it when the bag is falling apart. Read more