Fish Tank Filter Small Pond Filter for 100-200 Gal. Tank Crystal 420GPH Biochemical Filtration Powerful Submersible Water Pump Large Aquarium Accessories Air Supply

This filter is great and would be especially good for salt water or river/stream setups. If you have goldfish, no substrate, or heavy substrate, this would be a good fit. I can see this being great for ponds and turtle tanks, too. It's too strong and not adjustable enough for your typical decorative tanks with slower moving fish— unless you're good at scaping in enough releif/still areas. I'll be using this as a pump and will intermittently use it for when my tank needs a deep clean and filtration. High flow and quick to clear the water column. I like the filter media it came with, but I also added some of my own and there's plenty of maneuvering that can be done if you're picky about your filters like I am. Came well packaged and everything was included. The instructions were cute and very intuitive. It's much quieter than any over the side filters and will be bigger and more heavy duty than most. Well worth the price. I saw that some were struggling with the noise level and keeping this thing working and here are my recommendations for a successful set up: *Prime the filter before turning it on. Make sure it is fully submerged and has had time to fill with water. Turn it around until no air bubbles are coming out. *Add additional mixed filter media on top of the sponges, especially if it's already been cycled with good bacteria. I added clay rounds but kept them above the water inlet so the water goes through the sponges first. *If you want the quietest option, remove the air hose. It's not necessary, but nice to have, and you can always add it as needed. *Turn the filter off before making adjustments or moving it. If you bring it out of the water while it's running you can easily ruin it. *Initially, if your tank is gross, it will need to be rinsed more often until it stabilizes the water quality. That means it's doing it's job. Get a larger filter if it still can't keep up after 30 days.

This is a great addition to my aquarium, while it is made for up to 200 gallons it works great in my 100 gallon tank. Keeps my water clear and the fish love it!

Tsunami. Should have got size smaller for my 75. Very very powerful. Decent filtration clear water

This is the best filter I've had so far. Usually I would have 2 of these type of filters in my 75 gallon tank, but 1 does just the job right. It's a bit noisy but pushes out enough flow to pick up the mess a turtle can make.

I ordered this filter and it was lost in transit, so I cancelled the order and reordered. In the end I was charged for 2 filters, but only received one. My transaction was noted as cancelled through Amazon; however, there was no way to receive a refund. I contacted the seller and was able to get refunded for the lost/cancelled item. I'm using this filter in an outdoor 300 gallon pond. It is very powerful (I originally ordered the next level up, but it was too strong for the pond and I had to return it) and was able to clean up an algae bloom quickly. It's super easy to take apart and clean. I highly recommend this filter for a larger (200-200 gallon) tank or pond.