Home TECH SECTION Rossmont Riser RX 5000 – review – the power we missed

Rossmont Riser RX 5000 – review – the power we missed

martedì 21 Aprile, 2020

647

Our comments

As we are usual to remember an adjustable pump is the best thing you can have in sump, for a lot of reasons. The possibility to change the power to make it adapt to the conditions of the aquarium is the best .

Riser gives the possibility to set the pump and thanks to this you can change the water without switching off the return pump and this is a great comfort. Moreover, you can feed the corals eliminating any time of flow in aquarium. And know that you can activate this mode through your tablet or smartphone, or even through apple watch or similar devices.

Rossmont Riser RX 5000 - recensione - la potenza che mancava

The conclusions page is rich of material, thanks to the comparison with other pump we tested.

Comparison with other pumps

Comparison with other pumps leads us to very interesting conclusions. The other pumps we tested are Eheim, Hydor, Tunze, Sicce, Corallinea, Waveline and Ecotech Marine, whose data are in the following chart. You can find all of them in our page of reviews . They’re ordered by the reference value of the pump, that’s the product of the flow rate for the hydraulic head divided by two. In this way the area between the two sizes is obtained. We think this is the only way to compare similar pumps. If the reference value is very different, we believe that the pumps aren’t comparable.

Pump	Hydraulic head	Flow rate	Reference value	Consumption	Price	Efficiency	Economic Efficiency	Annual Cost
Eheim 1250	195 cm	1205 l/h	1175	23.8 w	98 €	50.6 l/h*w	12.3 l/h*€	56 €
Sicce Syncra 3	296 cm	2375 l/h	3515	42.3 w	100 €	56.1 l/h*w	23.7 l/h*€	100 €
Rossmont Riser RX 3200	281 cm	2766 l/h	3886	53.7 w	115 €	51.5 l/h*w	24 l/h*€	127 €
Eheim 1260	350 cm	2434 l/h	4260	62.1 w	155 €	32.2 l/h*w	15.7 l/h*€	147 €
Tunze 1073.50	436 cm	2143 l/h	4672	38.8 w	180 €	55.2 l/h*w	11.9 l/h*€	92 €
Sicce Syncra 4	380 cm	3709 l/h	7047	94 w	160 €	39.5 l/h*w	23.2 l/h*€	222 €
Corallinea BQ5000	404 cm	3504 l/h	7078	83.2 w	120 €	42.1 l/h*w	29.2 l/h*€	197 €
Rossmont Riser RX 5000	364 cm	4128 l/h	7513	83.7 w	145 €	49.3 l/h*w	28.5 l/h*€	198 €
Waveline DC6000	392 cm	4008 l/h	7857	50.2 w	283 €	*79.7 l/hw**	14.1 l/h*€	119 €
Hydor Seltz D6000	450 cm	4194 l/h	9437	53 w	125 €	79.1 l/h*w	*33.5 l/h€**	125 €
Ecotech Marine Vectra M1	610 cm	4944 l/h	15080	89.5 w	399 €	55.1 l/h*w	12.3 l/h*€	212 €

In the chart figure also the last six variable flow pumps, the Tunze 1073.50 (review), the Corallinea BQ5000 (review), the Waveline DC6000 (review), the Vectra M1 (review), the Rossmont Riser 3200 (review) and the Hydor Seltz D6000 (review).

Looking at the chart you can see that, from the economic point of view, that is the generated flow rate per euro, the RX 5000 is one of the most convenient pumps with its 28.5 l/h per euro. Technically speaking, considering its maximum values, the Waveline DC6000 wins by an inch over the Hydor Seltz D6000, but this Riser is at the third place. So, if the values you’re searching for match with this pump, as you can verify with our calculator, you’ve found what you need. Also, you know that in any time you can adjust this pump with the Waver.

Relationship with the declared data

Now let’s see the relationship with the data declared from the builder.

Hydraulic head

pump	hydraulic head	measurement	difference
Rossmont Riser RX 5000	360 cm	364 cm	+ 1,1 %

The hydraulic head as we have measured has an insignificant difference. The Riser keeps its promises.

Flow rate

pump	Flow rate	measurement	difference
Rossmont Riser RX 5000	5.000 l/h	4.128 l/h	– 17,4 %

The difference between measured and declared flow rate is slightly over the 17%. A noticeable result considering the great difference seen with other pumps.

Energy consumption

pump	consumption	measurement	difference
Rossmont Riser RX 5000	70 w	83,7 w	+ 19,6 %

The consumption is about the 20%. We sure have to consider it, even if in practice the energy efficiency remains pretty high.

Closeness to the declared data

Finally, as a term of comparison, we can use a match value on the base of the declared data for flow rate, hydraulic head and consumption.

pump	hydraulic head	flow rate	consumption	Final value (absolute)
Rossmont Riser RX 5000	101,1 %	82,6 %	119,6%	88 %

If you want to know if the pump faces your case I suggest you to take a look at this articles:

Conclusions

The reference value of the Rossmont Riser RX 5000 at its maximum power is about 7.857 l*m/h, where the declared reference value is 9.000, there is a moderate loss of the 13%. Remember that the reference value is the area between the values of flow rate and hydraulic head, exemplified by their maximums. So we’re going to do this operation: (flow rate x hydraulic head)/2.

The loss of the 13% actually is a good value given the fact that all its competitors do a lot worse.

In opening we wrote “the power we missed”, and we want to confirm it. The little sister RX 3200 that we tested last year, even if it was a good pump, lacked in that great power that aquariums bigger than 300 liters ask for. With this pump the gap has been filled. It not only is perfect, but it also has a backup of power that can be used. Moreover, you can also use it jointly with the Waver and benefiting from this additional feature.

Anyway, we have to consider what the pump obtained, not what it meant to obtain. In fact we have to choose our pump wondering if what has been measured matches our needs, maybe being also a little cheaper. Sure we have to consider that if you want to obtain the possibility to set the pump you have to add the cost of the Waver.

PROS

Great performances and close to the declared data
Adjustable pump on every value of flow rate among the available
Very well built
Very silent
The calibration can stop the exchange of water between tank and sump