Very poor design and it broke 3 months in. Amazon won't do anything because its past 30 days. But I did contact the manufacturer and they are going to replace the damaged part. Other than that part breaking this unit is legit. I really like it. Just a poor design on the regulating valve.

Been using this filter for awhile now. It's been fantastic for my 36 gallon tank. I believe the 225GPH is for a 55 gallon but it's done a very good job. I currently have it in a bedroom and when it's installed inside a cabinet its nearly silent. Despite being made for a 55 gallon, the current is not too strong for my tank. Even if it was you can adjust it at a reduced speed so its not problem.

The only down sides I have for this product...
1. No skimmer intake (not a big deal you can buy one separate)
2. Does not have a built in heater (to get one with your looking at $400 plus if you get one build in otherwise a heater is $20-$75)
3. Slightly annoying to clean since you have to dismantle it which will lead to water spilling around where ever you have it set up.
4. The rubber hoses are transparent, after a few weeks I've noticed beard algae start to growth within the pipes.

Overall I would buy again and been very satisficed.

Hardly know it's running, very quiet

It's and okay filtration. I have a 75 gallon aquarium as well as a 55 gallon aquarium. I bought the $85 filter for the 75 gallon which was adequate for the GPH.. the suction is not that great but they said you need a second filter for that size aquarium anyway. So I bought a second filtration for the 75 gallon I'm just not that happy with the suction that it provides. It keeps the tank maintained but it still does not suck up as much as I would expect it to..
Now I bought the next size down, smaller filter, for the 55 gallon which was adequate or the GPH, for my goldfish tank. Instead of being able to clean the filter once a month, like the bigger size.. I'm having to clean it once a week! There's not that many baskets for your media, there's only two! Whereas the bigger size up, the $85, has four baskets for your media! I would not recommend getting the smaller one.. it's just not that sufficient and it adds extra work and it's a hassle.
Another point that may not be neither here nor there because it's really stuck out to me with these two products being the same but different sizes.. I don't like how funk from the tank gets caught up in the outflow tube. So when I go to clean the filter and I come back to connect everything and get it going again, funk from the tubes spits out of the outflow back into the tank. It kind of looks like possibly algae or slime?? I've never had a filter do that before so not quite sure what's happening there just wanted to note it. I will get it figured out. And I can come back and give an update.
My suggestion would be do not waste your time for anything less than the $85 filter. But you're definitely going to need a second filter if your tank is 55 gallon or above. The suction is just not strong enough.

One last thing! I received the first $85 filtration system and the cover for the UV light was broken in the shipping. They sent me a replacement out quickly... I just wanted to know that I looked for a replacement cover for that UV light. (It's a quartz glass cover that had broke.) It is worth noting that the cover costed anywhere from the amount the filtration system cost me and above. So what you get is great for the price, but you will need a second hang off, filtration.

It's a great filter. My only problem is that the surface skimmer does not work at all. I don't think it's user error because I followed the instructions and even watched a tutorial . I'd much rather have the filter , the surface skimmer was just a bonus I'm not too upset about. Just a little bit of a bummer. I did end up putting something under the filter housing as support because I wasn't sure how my cheap rimless 14 gallon cube would hold up to the pressure of the weight of the filter hanging off the back. It's been up and running for 4 months now. Doing great. Would buy again to upgrade a couple of my other tanks.

Just an FYI for shrimp keeper's. Shrimp will get into the filter if you do not put a pre-filter sponge over the intake. 2 weeks after I introduced shrimp, I maintenance the filter. I found 4 adult neocardinias in the filter and 6 babies. Alive and well, just an ideal place to want them to be.