Fluval C4 Hang on Power Filter

After 1 year of usage the steam of impeler is rusted now it doesnt start on it own and pump gets heated up. Also cleaning switch is not working.I have to say my venusaqua top filter is working flawlessly 24x7 since last 2 years and no complaint.

Super quality filter keeps water clean need less maintenance of aquarium. From last one year I was using this filter worth every penny I spent on it. This is my 2nd filter for my newly built aquarium. Extremely good packaging was done by the seller.

Dang this filter is good.. not a fan of activated carbon in HOBs due to their short shelf life .. they need to be replaced every 2-3 weeks. I'd rather recommend purchasing seachem's purigen along with a Ista media net and this filter with def help in helping your aquairium clean.

The media could not be loaded.  Many people here compained here about the noise. I have been using it since a week and it is extremely silent. Water is crystal clear and flow is good. The packaging was too very well done by seller. I am really happy with this filter for now. My tank is custom built and is about 74 L. I just don't know which skimmer to use with it.

This damn thing won't even last a year. I don't know if it's the impeller or the pump itself but I have to manually make the impeller spin. And then it stops again. Very annoying. My Aquaclear is almost 2 year old now and still works somewhat fine. This thing is awful.

Silent working

Impeller stops rotating in every couple of days. Got a scratched product from side. Doubt that it's a faulty product delivered to me. Problem starts after two weeks of purchase.

Good filter

The filter itself was a lot bigger then I imagined even though I saw the description. It was also scuffed on one side, which is odd for a new product.The first let down was when I saw it had a EU plug. The second let down was when I saw it had NO English instructions, further proving this was not made for the UK. Having bought this from amazon.co.uk, I thought I would have little chance of getting an EU product as mentioned in the other comments.This is not Fluvals fault per say, more the sellers (amazon).I decided to plug in the filter with the only adaptor plug I had to see if it would be worth spending more money for another adaptor, however, it wasnt. Setting it up was simple enough and I removed all the media first so that if anything wasnt to my liking, I could send it back media unused.It sounds like rocks in a tumble drier. I am not new to filters, having had 3 already noisy filters in the past so after the air came out and I gave it a little shake, checked the impellor, it was still noisy as hell and it wasnt the waterfall or tank vibration, or filter casing, it was inside the filter itself.I took it all out and let it all dry and it is currently sat by the front door to be picked up.

After going through a number of external pumps which all seemed to ultimately start to leak over the carpets I decided to give the Fluval C clip on a try. It was easy to set up is quieter than the other pumps and the little device indicating if the filter is blocked is ideal. Installation must be planed carefully as it is a clip on device. The only negative aspect is the filters which are hard to obtain. Stocked in US but postage is horrendous. Also stock on Amazon DE but is difficult to use website if you cannot speak German ( can use website translator but it does not translate any authorisation messages which pop up). Finally found a generic filter on Amazon from China takes a while to come via China Mail I awaiting my shipment.

the noisiest filter I have ever had. I have 3 fish tanks, 150l with three external filters that one can't hear even at night, and another overhang filter from all pond solutions, that you can also only hear the water trickle, but this one? Ou my god, its loud, when I pluged it in I thought something is broken, so I took it apart and checked, but all is good, then I checked the reviews and found there is an issue with noise on this particular one, some saying the noise goes away after two three weeks, so I kept it running, but it's been month now and it's as loud as the day I turned it on. also the all pond solution overhang filter has surface skimmer build in to the suction piece, kind of seems missing on this one, definitely in function as I got lot of biofilm build up.It's a shame it has these major flaws as otherwise I like the way the compartments are organized and the way i can see inside, size is good too. still running it but if it doesn't quite down in next few months, I'll be replacing it with something else.

I am using this as extra filtration on my large cichlid tank, easy to set up, although please note it can be quite heavy once loaded up with media, and primed with water.Starts of a bit noisily, but once you get the level right, and the impeller is comfortable, it soon quietens down and all you can hear is the trickle of the returning water.Arrived before the expected delivery date, very well packaged so no issues there. Seems great at the moment.

Wanted to use this as a HOB on Marine tankWorks as described - the power consumption is 3W and you get good flow.Took out all the chambers and have put Carbon and Phosphate reducer in it.Added a piece of filter floss to the waterfall to reduce the waterfall noise.PS: installed it on a Juwel rio 240