Our comments
The MaxiJet MJ500 is the perfect pump to use in an aquarium. Sufficiently perfect to do just about anything, from managing any kind of filter to using it for many necessary tasks, such as cleaning rocks with a strong but not too powerful flow, useful for passing change water from the vessel to the aquarium, and so much more.
The report with stated data
Let us now look at the confidence with the data stated by the manufacturer.
Pump head
| pump | pump head | measurement | deviation |
| MaxiJet MJ500 | 110 cm | 109 cm | – 1 % |
The head measurement has a very small deviation such that it can be considered completely negligible. The MJ500 delivers what it promises.
Flow rate
| pump | flow rate | lab measurement | deviation |
| MaxiJet MJ500 | 550 l/h | 522 l/h | – 5 % |
The deviation between measured and declared flow rate is close to 5%, again a practically perfect value. Chapeau, because differences are often on the order of 40%.
Power consumption
| pump | consumption | lab measurement | deviation |
| MaxiJet MJ500 | 5,3 w | 5,1 w | – 3,7 % |
Power consumption is about 4% lower. Again, another value that is absolutely in line with what is claimed, probably due to the grid voltage at that precise time.
Correspondence with respect to declared data
Finally, just as a term of comparison, we can give a value of correspondence with respect to the data declared by the house for what concerns flow rate, head and consumption.
| pump | pump head | flow rate | consumption | Final Value (absolute) |
| MaxiJet MJ500 | 99 % | 95 % | 96 % | 96,7 % |
In conclusion
The reference value of the MaxiJet MJ500 is 284.5 l*m/h, where for comparison the stated reference value is 302.5, a loss contained to 6%. Note that the reference value is the area subtended by the flow rate and head values. Basically we are going to do the operation of (flow rate x pump head/2).
The 6% difference is currently an excellent value given that virtually all direct competitors do worse, much worse. And never before had we measured a value so close to the technical data.
In any case for our aquarium use we must always consider what the pump actually expresses, not what it should have expressed with respect to the stated data. But in this case the two values are virtually identical. An incredible added value when choosing.
PROS
Excellent performance and coincident with the stated values
Excellent construction
Quiet
Versatile
CONS
Nothing relevant
Disclaimer: We thanks ASF Aquarium Systems to have sent us this MaxiJet MJ500 for the purpose of this review.
