MarineLand Magnum Polishing Internal Canister Filter, For aquariums Up To 97 Gallons, 10.5 IN (ML90770)

Powerful little filter. Bought this for a 55 gallon tank cleared up in hours. Read a lot of complaints about noise but if you fully submerged the filter as directed it's whisper quiet. If you leave the top sticking out of the water it makes a rattling clicking noise. I'd be careful on smaller tanks it moves a lot of water.

This filter has performed beyond our expectations! Our 55 gallon tank has never been so clean. We are running our 360 canister with this filter and the water literally sparkles. We can tell our tank makes our fish happy, our guppies are reproducing again!

TL;DR: Major design flaw. Impeller is not designed to properly sit in the motor unit and just grinds unbearably. Taking apart and cleaning (a nuisance at best) will temporarily resolve. Seems impossible to order replacement impellers so if you need to fix it you're SOL unless you want to drop money on a new one, which will inevitably have this issue again.I've been a fish hobbyist for over a decade, and in that time I've concurrently kept dozens of tanks with different species, sizes, water types (fresh, salt, brackish). I've even worked in the trade before. When I moved into my house a year ago I decided to get a large show tank for the living room, and decided to go with an internal filter because on average they're easier to maintain than external canisters and less ugly than overhanging ones. I've used many different brands for my other tanks, mainly Fluval and Aqueon, but I went with a Marineland for this one because they used to be really good.This thing will be whisper-quiet right until you're passed the return window (convenient!), and will do a good job keeping your tank clear. Within a month or two, the filter started making a grinding noise, and per manufacturer's instructions cleaning out the impeller blade helped for a short while. It wasn't long until no amount of cleaning, weekly or daily, could fix the horrible grinding noise that this thing would make. Seriously, I'm great at tuning out sound but this was god-awful. I felt embarassed to have guests over it was so bad.I concluded after taking apart every inch of the motor that the impeller blade that I received was just faulty, but as of writing this review YOU CANNOT GET REPLACEMENTS, as looking at their website it appears they've been out of stock since pre-pandemic. They're still selling the model, but you cannot buy the impeller separately, which means the only option is to buy a new unit, which is ridiculous company practice. But don't worry! Customer service responses on their Q&A indicate that the part will be coming back "soon." This is, of course, the same response that you'll see if you keep scrolling to customer questions from 2+ years ago. They're not intermittently out of stock, because you can see multiple people have been patiently awaiting replacements for all that time.I bit the bullet because I assumed I just got a bad one, and I didn't want to completely change my set-up. But less than two months in to this new one, it's already making the grinding noise. I'm writing this review with the unit completely stripped and disassembled in the other room, and after doing extensive research it seems like this is a common problem for this model. Their company page for the impeller is littered with people complaining about this issue and canned service responses indicating "it just needs a good clean." I've taken apart MANY motors, and the issue is not that it needs a good clean. It's not even that it needs some oil (tried), some o-rings to soften the impeller rod ends (tried), or a good flush (tried). You'd have to re-cast the piece entirely and tweak the housing to get it to work as intended. My partner, handy with bigger motors and mechanical parts, took one look at it spinning and concluded the same before I even managed to get it off the motor housing.I know this is long-winded, but honestly I'm just frustrated that it seems like they're willfully ignoring a severe design flaw, and seem to be fine selling more units of this without offering the replacement parts they must know will be needed at some point. Shame, but I don't think I'm going to buy Marineland ever again. Marineland used to be my number one recommendation to new hobbyists but even though set up is simple, maintenance of this model is NOT beginner- or consumer-friendly. Blegh.If you get this model, just use it for infrequent water-polishing (note, it doesn't come with DE or a polishing medium, so you still would have to get that separately, and ensure that it's the right size for the housing unless you want dirt soup in your tank). Don't purchase it as a filter.

I wish 4.5 stars were available. Like many others, my filter made a frequent and annoying "buzzing" sound that was really annoying to me - and must have been terrible for the fish. It ALSO clogged and stopped working frequently. I was at a loss. I cleaned it out every few weeks and just accepted the noise (which wasn't always there, but often and sporadic). Then one day the filter stopped working again, and I cleaned it out and reassembled. Even clean, it didn't work. I took it apart and looked at all of the components. My best guess was the motor, so I called Marineland, and the customer service was outstanding. An American representative spoke with me, and after some discussion sent a replacement. When the new one arrived, I inaderently spun the impellor - and it had A LOT of resistance. I pulled the motor from my unit and the impellor spun freely. Then I put the new magnet/impellor into the old motor, and it had a lot of resistance. So I examined the two impellors: there's a plastic "weld" or indentation on both units that corresponds with a cam stop on the impellor shaft. The new impellor was also glued to the magnet, and could only rotate half a turn before it hit that stop. The old unit was not glued (anymore) and seemed to have broken free from the cam, so it spun freely - and therefore got no purchase as the motor spun the magnet. I replaced the impellor and got immediate and silent operation. I suspect the early batches of this product didn't have a secure enough impellor, and that's where the noise came from as it "skipped" and ate away at the plastic cam stop, until it eventually failed. The company took excellent care of me, and I'm very happy with this resolution.EDIT: Within two weeks the buzzing came back. I'm still certain that it's an issue with the impellor and impellor housing - only moving part. Another reviewer said he cleans every time it starts to buzz. I may try that.EDIT 2: I can confirm that cleaning the filter stopped the buzzing noise - and it was filthy after two weeks. I feed sinking pellets near the filter. Guess I'll move to the other side of the tank.

Keep cutting out blowing fuses

Funciona muy bien lo recomiendo

Second time purchasing this, the cord broke off right at the motor on the first due to hardening and the lack of a strain relief boot for the cord (some feedback for Marineland), rendering it useless, but it worked well and lasted a long time and was worth the $100. It is quiet, if it makes rattling noise that means the filter is clogged, it works fast and can clog quick, it is simple to service. It obliterates air and helps oxygenate the water or move your C02. It gets the water crystal clear with the white filter. Clears a tank and moves water very fast. Don't handle it by the cord in the water even if seems buoyant.

This filter is great. Before, I had Aqua Clear Filter that destroyed my floor and my wall and it was so noisy it was driving everyone crazy. I feel like this is the best item for the price if you don't want to invest in a refugium.It starts to make a little noise when it gets dirty. I keep it clean (clean up once a week) and my water is perfect without even hearing the thing so I really don't understand people saying it is noisy... I have a 90g reef tank with 7 fishes so except the fact that having it is not perfect because of the aesthetics, it is still a great item for the price.

Excelente