I think this is a great filter. Can be easliy customized to anyone's needs. The only problem i've noticed is when I have the valve block disconnected during cleaning it leaks. I have to set the valve block in a pot or bucket while I clean the filter. I tried to tighten the screws on the bottom of the valve block to stop the leak, DON'T DO THIS. I figured out that if you get them very tight that when you hook the valve block back up and push the lever back down to open the flow back up it won't open and will have very little flow. This is why people are having flow problems. Loosen those screws just a tad and you will regain flow. Other than that it has no leaks while in operation and does a great job.

I own 2 of the 360's, and one of the 530's.
Easy prime,easy set up,
easy use.price is more than fair.(even though free is better) I would recommend!
After reading other reviews I had to comment on the leaking issue.I have never had one leak...Am I lucky?
Or maybe the issues have been fixed.

360C - Love IT!!!

This is my first canister filter and it couldn't have been easier to setup. Keeps the water clean and so, so quiet. Next week I am going to rinse the sponges so will see how it goes as I have heard there can be problems here and there with that. Will update review afterwards.

The video on here in the Library section was very helpful too.

great filter!!!
great water flow,easy to clean,easy to assemble,good price,and great bio filtration for my fish.
you did it agian marineland!

I had two C220 on my 55gal. the flow rat is very weak the output does not even break the surface of the water to create oxygenation also the low flow rate causes a lot of debris to stay in the hoses and blows it back into the tank when you restart the filter after water changes and I don't have time to break down every filter weekly to clean the hoses out risking the lose of ben. bacteria due to over cleaning of the filters I have Fluvals on all my other tanks and they are much better the housing of the marine land filters also seems brittle and likely to crack I now use the two I have as extra filters on other tanks as a back up. Their main selling point from retailers is that they come with all the media you need and other filters don't however I would rather select my own media depending on the water conditions I am trying to maintain in a specific tank I would not recommend them unless its free and you need an extra bio filter. Also I check or do clean my filters monthly during water changes and never allow to much build up of debris to cause constricted flow rates.

Had a c-360 for a year. The filter leak 30 gallons of water. Called Mairneland will be sending out a new pump head for it.They're custmor service rocks. Hope this fixes the issues. Will update.

March 28,2009: I have only owned the C-360 for a month now.I like every thing about it.Most of it already said in other past reviews.
I noticed that other reviews on the internet that a lot of people are having leaks with the C-360 after a few weeks or months.I noticed right away why a leak problem may occur in this filter.The hoses that come with this filter are large and heavy when filled with water.If you just slightly move the hoses,you can see the entire valve block move.If you have a long length of hose that is free hanging I am sure this puts a lot of stress on the valve block assembly that could warp it,wear out the o rings or even crack it over time.That's why in the past I have always supported the hoses with plastic ties,heavy string or a custom clamp of some kind to any canister filters that I have owed in the past.I have done the same with the C-360.Hopefully I will not have any leaks in the future. I really think this is one of the best performing and designed canister filter made except maybe for the valve block assembly.I will write another review in a few months.

Update October 4,2009: Its over eight months now and this filter is working great. Its whisper quiet,water is crystal clean and its easy and convenient to clean. I have no leak issues at all. I still think this is one of the best performing and designed canister filters made.

I have only had this filter for about 1 month. But the water is crystal clean. I'm actually thinking about buying 1 more due to my overstocking and my pleco that loves to poop everywhere.

I know a lot of people seem to be having problems with their Marineland cannisters, but I've had my 220 going for about 6-8 months with no problems at all. The only complaints I have are small--I wish their reassembly arrows on the pans were in red or something easier to see, and I have a little trouble getting the top off. It seems to seal too well. I have to give a bit of a pry with a butter knife. It does a great job keeping the water very clean, though, and since I got it on sale I consider it a great deal. I clean less often than with my Eclipse biowheel, but it does take longer at each cleaning. These filters are a bit labor-intensive. I feel like it's an appropriate tradeoff, though. I, too, would appreciate a spray bar but I think I'm going to rig something up.

Re: C-220
The unit comes with a DVD instructional. They recommend watching it once through before setup. They're right. Previewing the vid makes everything very understandable. Then you can pause the vid while you execute the setup. The priming feature is indispenseable. It's so nice to keep my hands out of the tank when dealing with this filter setup. The media trays are versatile and oversized which allows for an excellent water flow. The final bonus is a noiseless operation and it's easy to tell when the media needs changing cause the water flow slows down...giving you ample notice that it's time for maintainence. I've had Eheims, Fluvals, and other brands over the years. This is the best unit I have ever owned and operated. It's rare when a piece of new equipment can breath new life into this hobby. Simply the best tank related purchase I've made in many years. Although I haven't had it long enough to know it's reliability over time, I will certainly write another review some months down the road...after I've changed out medias a few times.

I have been using 2 C-360 on my 55gallon for about a year now and still no problems. If I look closely at the outlet bar...you can see it suck up a great amount of waste that is in your tank! the water flow isn't so bad either! Instead of the bio balls (for my sump now) that came with the canister i used ceramic rings! lots of it! If you are looking for a filter that will work with no trouble then buy one of the C series!

I got a C-360 and it was working very good in first 3 month, and than the water flow decreased itself for another 3-4 month and start have water pumping issue. Finally, one day around the 14th month it start leaking after my monthly cleaning. Just received the replacement parts free from Marinland. Anyways, their customer service are excellent. Not yet test it, but i don't think I will buy any of Marineland filter... ever...

As in reviews i have read works PERFECTLY for the first 9months then arfter you clean it it leaks. I called them and sent me replacements this fixed it for the first month now it is leaking in diffrent places and im about to throw it on to the curb. It has destroyed my $400 stand and i might have to replace carpets. PLEASE DO NOT BUY THIS FILTER.!!!

I have used many different canister in the past. I decided to buy this one because it was new and due to cost. The filter ran perfectly for about 9 months. The first time I tried to clean it after 9 months it started to mysteriously leak. I thought maybe it need a new top o ring. I purcahsed a new o ring and re tried. 10 hours after running leak free, the top started to spray out water. Seriously this product is junk, avoid it at all costs it will cause a flood. Its to bad because the filter pans and clamps look to be built well.

Please avoid this product for your own safety. I have thoroughly looked it over and cant determine why the oring doesnt re seal after cleaning. I think its a design issue.

Ok, I received this filter in the mail and was so excited to start it up. It was simple to put together and it seemed like a sure thing. But wait... I have 2 extra o-rings, for what? So, I called the company who told me that they were replacements for the existing ones (on barbs). I took it apart to see what they were talking about, couldn't find them and called back. The same representative answered the phone. He told me where they were located and then asked me what size tank I had. He then paused (waiting for someone to leave the area?), told me he was looking for the number I called with to call back, and very quietly said they were having a lot of problems with it (I guess, the rumors are true as stated in another review) and to take it back and get a different filter. They are having leaking problems... whoa! Angry employee... possibly. But based on a couple reviews who stated the same about leaking and someone who doesn't want to risk 75 gallons of water on her floor... she's taking it back.

This is my second canister (eheim classic) which had priming issues and now possible leaking issues... I'm done. Sticking with what I know and like... and a HOB Aquaclear. Maybe one day, when leaking and priming issues are resolved, I'll look into another canister.

Bottom line: Save yourself the time and hassle (and floods)... get a different filter.