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).I have some old Maxi-jet 1200's...they have white impellers & work wonderfully. I needed to add one more & so I figured I'd stick with what's worked well for me in the past. It seems Marineland has changed their models..the new one has a different impeller (it's purple, so that's how you know when you got one of the new terrible ones). The first one I got, the impellers SHEARED OFF completely within a day. So I exchanged it out for a new one...the impeller on it was wobbly & made so much noise it wasnt worth keeping.
I'm so disappointed in these new pumps. It's too bad they couldn't have stuck with their old quality designs. DO NOT BUY.
Buy Maxi-Jet Pro Aquarium Pump Now
I needed a pump to use in a sump I was building. Only needed about 100gph of flow going back into the aquarium from the sump. This was perfect, it's actually more than I need which is good.*** FLOW RATINGS
It's rated for 1,300GPH, which is based on open-flow. Meaning just being used as a powerhead to push water around an aquarium. It comes with a screw (propeller) and an enclosure, and it will DEFINITELY move your water around fast. For "pump" mode, it's rated at 295gph open flow.
With the fittings I used, the smallest restriction is 3/8". The tubing is 1/2". I'm able to get over 200gph of return flow with this setup, which I have to dial-down using a gate valve in order to maintain my precise needs. Remember, more GPH is BETTER than less, because you can't dial-up the flow.
*** FITTINGS AND STUFF
This comes with everything you need for almost any purpose. It has the normal powerhead fittings, as well as a complete screw/cover kit, suction-cup kit, air-scavanger tubing, flow angle thingy, and a really long cord.
*** IT ISN'T LOUD AT ALL
I can't even hear the thing running inside of my sump. If your pump or the direct fittings coming off of it are touching something, then yes you will hear the noise of the pump. The water itself makes no noise. It's no louder than any other powerhead I've tried.
*** SUMMARY
You can't beat the price and speed of shipping when purchasing it through Amazon Prime. Even my local Care A Lot couldn't get it for as cheap!I just purchased a Maxi-Jet 1200 to replace a unit that finally died. I figured I might as welll replace it with the same model as I had not had any problems with the original one. Well I received it today and was excited to install it. Got it all set up and plugged in and sat down on the couch to marvel at the tank. Within 10 minutes the pump stop working.When I went to open the unit I found a propellerless purple impeller (the old one was white). Im pretty disappointed as I thought that Marineland was a name that I could trust...I guess not anymore.The pump moves plenty of water in my 120, but it only ran four days, before it self-destructed. The impeller flew apart and rendered the pump useless. Like I saw in another review mine was the purple impeller. When assembled as a wave maker the pump did move a lot of water, in fact to much water in my 120. Not necessarily a bad thing but worth noting.
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