Marineland ML90509 Maxi-Jet 400 Pro, 110/500GPH

I've seen some mixed reviews and I think some people might be getting some bad apples, I say that because ive had my 600 in my tank working as an internal polisher for about 2 weeks now and it's dead silent. It puts out less noise then my brand new fluval 407 canister. Thinking about buying a second one for my larger tank to help move a little more water around.I also did test it in both modes the wave maker and power head mode and both were really quite the wave maker mode throws a ton of water it was to much thats why it's now running as a water polisher in power head mode.

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Blurb does not tell you it's from USA, has a flat two plug and the voltage is not UK compatible, therefore unusable. Sent back, ordered an Uk product at a third of the price.

Marineland has come out with this ultra cool powerhead/circulation pump combo. I love powerheads in my tanks because of their efficency in moving water and filtration for a reverse or forward flow undergravel filter/or sponge powerhead combo. It has proven to be ideal in my clown loach tank where I am just using multiple penguin powerheads/sponge combo and have had them alive and thriving for nearly 10 years. When I saw the new Maxijet PRO I just had to give it a try. My clowns love playing in quick water as in nature they are from areas with high water movment-so I decided to buy this for the circulation mode. Other strong circulation filters are three times the price of these and are weaker or equal to the power. I have read many reviews saying they were very loud but I find mine to be very silent considering the power, only a very slight hum can be heard when I am within 3-4 feet. I found that at first when I started it it was really loud, but after a couple of minutes it became almost silent (I think the air had to be purged and propeller locked in, try shaking them a little and putting your hand over the back part where the water gets sucked in to quiet them down when you first get them up and running). Now when I turn them off and on during water changes the initial loud noise is gone and they start up perfectly. If I had saltwater tanks and were using them with a wave maker I probably would worry and instead spend a little more and buy the old maxijets with the aftermarket conversion kits or Hydors. But for my clown loach tank they are perfect, so perfect that I have decided to buy another one! Now, after reading the reveiws I am still worried about the reliability, but after finding out that the loudness is false I feel more secure with these. With a two year warranty like the penguin products I highly doubt they would make the new Maxijet Pro's as bad as some of the reviews have said. If anything, I can still use them as powerheads if the circulation mode fails. I have faith in marineland quality. I would recomend this to people with large tanks or people who keep fishes that love fast moving water! Oh.. and to add I think the black suction cups are great, much better than the crappy clear ones that come with the penguin models which seem to harden and become useless in half a year. I change out the clear ones and use the black suction cups and dont have problems with my powerhead falling anymore. With three of them I feel pretty safe. Maybe saltwater is different and much harder on the suction cups, makes sense since salt water tends to quickly dry out, crack, and corode rubber products...Update: Since using them for a little while I can see no problems with their reliability and they are solid powerheads like other marineland products. I do however have a little problem with them heating up my tank water. Since I live in a tropical climate my tanks are naturally around 82 to 84 degrees which is warm enough already. I put two in a thirty gallon tank and my tanks temperature skyrocketed to 90 degrees! I have since moved them into my 125 gallon and have no problems with them raising the temperature. Could be great if you live in a colder climate which could save you money on a heater!Update #2: After using them in circulation mode for a while I have noticed that they have a huge problem creating heat. They give off so much heat that they have even become a problem in my 125 gallon tank. I had to take one off and am now only running one of them. The temperature increase is not noticable with only one of them, but when I try to run two of them it can go up to 88 degrees (normal temperature hovers around 82-84 degrees) in my 125 gallon tank. The reason why I say 88 degrees and not higher is because when I noticed the temperature was that high I took one of them off imediately. Would be great using them in a cooler climate (would take some of the strain off your heater), but here in Hawaii it can be a problem. They are still silent and dont seem like they are anywhere near breaking. The trio of suction cups hold on good and strong. They do make a rather loud clicking/grinding noise when first starting them up (after unplugging them) that makes me think like they might break, but after a few seconds they start up perfectly and do their job very quietly. I think the problem is their large power consumption compared to other circulation powerheads/pumps. I have two Hydor Koralia Evo 1400's that dont even come close to heating the water even in my 30 gallon tank (they also dont make the loud clicking noise when restarting). Still if your looking for a cheap circulation/powerhead and you live in a cool climate, or only want to use one in a large tank, or have a really large tank, they work great. Don't know what happened to other reviewers maxijet pro's but mines are really really quiet, infact over time they have become SILENT. I have to literally put my ear up to the tank where they are mounted to hear anything from them, even then they are still hard to hear (after the restart that is).

It just fits and works like it should, right out of the box.