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Special application of Turbelle 7100/2

Special application of Turbelle 7100/2


Enquiry from Mr. Engelbrecht / Germany

Please E mail to me the instructions for use of Turbelle electronic 7100/2, e.g.. in PDF format. Perhaps you could also calculate for me approximately how many litres of water would enter my aquarium still using the aforementioned pump. The pump is accommodated in the basement in an external filter tank – clear water chamber, continuously rising the water volume must reach a height to the aquarium of approx. 3.40 m with a tube length of approx. 20 m (1 in. tube) and with eight bends. Perhaps you have a more powerful pump in your scope, if yes please E mail me details.

Answer

To provide you with a really satisfactory answer we would like to know more about your basin:
- How many litres, what size ?
- Fresh or salt water ?
- What kind of filtering is used ?

Installation would be possible with 2 x 7100/2, connected at the outlet with a Y piece. To this end the pumps would have to be retrofitted with a power rotary pump. With this equipment you can achieve an overall performance of approx. 1500 to 1800 l/hr.

Enquiry

I would like to ask some questions about pump 7100/2. First of all, a brief description of the aquarium installation I intend to buy in the near future.
In the living room a corner aquarium, approx. 350 litres with a 40 mm opening in the side pane. The outlet will take place through a filter basket and tube extension to above the water level, here a Tee piece for air intake so that it is not pumped empty on electricity failure, and then continues downwards to the glass opening and outlet in the basement. In the basement a filter basin will be installed (glass basin 100 width x 50 depth x 60 height) with five chambers, in the outlet of the last chamber clear water chamber with TUNZE pump 7100/2. It will be a fresh water basin with many plants and discus. A flow rate of approx. 360 l/hr in the upper basin would be quite adequate.
And now my questions:
The outlet 40 mm tube would amount to approx. 18 m, with 7 bends and the drain pipe set 1075/2. Is the diameter adequate and is one tube sufficient ? In the living room I will additionally install a TUNZE water level alarm 7607.
The 25 mm inlet tube will amount to approx. 18 m, with 8 bends and the inlet pipe set 1073 from TUNZE. Is the diameter adequate to achieve 360 l/hr flow rate with the pump 7100/2.
How high do you think is the maximum flow rate achieved by the pump ?
Should I use a larger tube diameter, would that prove more effective ?
In the event of an electricity failure (I also use the TUNZE food timer) the power must be reached again to pump the water up.
Do you think this construction would function and not be too loud in the living room ? That not too much oxygen enters, the plants will still grow and a carbon dioxide supply is still possible without emptying a 2 kg carbon dioxide cylinder every month ? (the carbonate hardness is approx. 3 – 4 KH).
For safety against an electric shock I will also install the TUNZE EL safety set 7061. I hope you can answer my questions and perhaps give me a some advice.

Answer

- The tube outlet 40 mm will amount to approx. 18 m, with 7 bends and TUNZE drain tube set 1075/2.
- à In this particular case one 40 mm tube should be adequate. But, in view of this length, what happens if snails or detritus settle in the tube ?
In the living room I will additionally install a TUNZE water level alarm 7607.
à Yes, we recommend this alarm in this case because the filter contains almost as much water as the basin. But you can control only the level in the basin, the cables are unfortunately not long enough,
- The 25 mm inlet tube will be approx. 18 m long with 8 bends and inlet pipe set 1073 from TUNZE.
à Normally yes and with only a single pump, but do not exceed 1.80 m level difference between basin and filter.
- How many litres maximum flow rate do you think that the pump would reach ? Should I choose a wider tube diameter ...
à No, rather leave everything as it is, you ought to reach a performance between 400 and 600 litres.
- Even on an electricity failure (I also use the TUNZE food timer) the power must be reached again to pump up the water.
à Of course, that will work !

- Do you think that this construction will work ? That it is not too loud in the living room ? Not too much oxygen enters that the plants will still grow ...
à The carbon dioxide supply must take place in the basin direct in any case. We cannot guarantee the rest because it depends on the basin as a whole.

- For safety against an electric shock I will also install the TUNZE EL safety set 7061
à Is marvellous but remember the PH regulation and the automatic CO2 dosing unit 7074


Question / Answer

After accurately measuring the tube length I must correct myself. Tube length 17 metres and 6 bends ! In my case the height between filter water level and aquarium is 3.2 metres. Would the pump nevertheless be satisfactory ? How much water approximately passes through. According to the information from TUNZE this will be up to max. 6 metres height at zero power but at 3.20 and tube friction loss approx. 400 litres should still pass through, or am I mistaken ?
à Yes, you are completely right, the 400 l/hr should be easily achieved.

... Is the recommended rotary pump 235.12 a standard item of the pump or must I order it separately ?
à You must order the rotary pump separately. There is of course no risk for the pump, we recommend this alteration only due to your special installation.

... Why must the carbon dioxide inlet take place in the aquarium and not in the filter basin ?
à In order to save carbon dioxide the inlet should be as near the plants as possible. But that is not a simple matter, only a recommendation. Should a problem arise in the living room, you can also discharge the carbon dioxide in the filter but you must expect slightly higher losses due to the water current.

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