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Retirement and forum shutdown (17 Jan 2022)

Hi,

John Howell who has managed the forum for years is getting on and wishes to retire from the role of managing it.
Over the years, he has managed the forum through good days and bad days and he has always been fair.
He has managed to bring his passion for fish keeping to the forum and keep it going for so long.

I wish to thank John for his hard work in keeping the forum going.

With John wishing to "retire" from the role of managing the forum and the forum receiving very little traffic, I think we must agree that forum has come to a natural conclusion and it's time to put it to rest.

I am proposing that the forum be made read-only from March 2022 onwards and that no new users or content be created. The website is still registered for several more years, so the content will still be accessible but no new topics or replies will be allowed.

If there is interest from the ITFS or other fish keeping clubs, we may redirect traffic to them or to a Facebook group but will not actively manage it.

I'd like to thank everyone over the years who helped with forum, posted a reply, started a new topic, ask a question and helped a newbie in fish keeping. And thank you to the sponsors who helped us along the away. Hopefully it made the hobby stronger.

I'd especially like to thank John Howell and Valerie Rousseau for all of their contributions, without them the forum would have never been has successful.

Thank you
Darragh Sherwin

Small external aquarium water pump

  • gggt (gggt)
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15 Feb 2011 15:47 #1 by gggt (gggt)
Small external aquarium water pump was created by gggt (gggt)
Hi

I'm looking for some low flow external (ie non-submersible) water pumps to use with scientific equipment. I have used such pumps purchased from aquarium shops previously in UK and Switzerland and they're ideal for the purpose, but I can't remember the brands.

We need a water head of approx 25cm. The flow rate of will less than 50 litres per hour so slower than the full speed of even a small aquarium pump, but I previously just crimped the tube to restrict flow with a small enough pump and that worked fine.

Most aquarium water pumps are submersible but that won't work for our needs. I found a review for a Maxijet MJU 1100 that has an inlet adapter for external use (picture attached), but the pump size and flow rate are too big.
www.advancedaquarist.com/2008/8/review

Does anyone have a suggestion?

Thanks.

Andrew.
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15 Feb 2011 16:53 #2 by JohnH (John)
Hello, and welcome to the Forum.
You could check out Eheim filter company.
They do a small range of external pumps, but I fear they might be too powerful for your requirements.
There is a restriction 'valve' which reduces the flow but you would need to check the litres per houe even so.
Anyway, it's somewhere to start.
IGM might have other suggestions when he next logs in.
John

Location:
N. Tipp

We're just two lost souls swimming in a fish bowl - year after year.


ITFS member.



It's a long way to Tipperary.

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  • wolfsburg (wolfsburg)
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15 Feb 2011 17:47 #3 by wolfsburg (wolfsburg)
Replied by wolfsburg (wolfsburg) on topic Re: Small external aquarium water pump
I don't think what you are looking for exists in the aquatics trade anywhere near 50LPH. You could try a peristaltic pump, this is sometimes called an auto-doser when used in an aquarium but the ones for dosing in an aquarium only pump 50 or 60ml/ hour usually.

wikipedia
lennoxpumps.ie

...no prices but they ain't cheap pieces of kit!

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15 Feb 2011 18:41 #4 by gggt (gggt)
Replied by gggt (gggt) on topic Re: Small external aquarium water pump
Thanks. Scientific equipment has low volume sales and high specs so it's always expensive. This is what we're trying to escape.

Reducing the full speed flow by several fold using constricted tubing has worked well for me in the past. The equipment is in a cold room so the pumps never overheat.

The problem is to find such small external pumps these days.

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15 Feb 2011 19:10 #5 by gggt (gggt)
Replied by gggt (gggt) on topic Re: Small external aquarium water pump
The Eheim 1046 looks like it might do the job. It was even used for watercooling overclocked CPUs!

Can anyone recommend a source for Eheim in Ireland?

Thanks for all your help.

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15 Feb 2011 19:12 #6 by wolfsburg (wolfsburg)
Replied by wolfsburg (wolfsburg) on topic Re: Small external aquarium water pump
You might be better trying model shops (fuel pumps etc) or the motor-less pumps that you drive off a power drill

Image link:

If you are good with your hands you might also try the pump from a windscreen washer on a car or other vehicle as these work externally and wouldn't have a massive flow.

Good luck with it anyway!

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15 Feb 2011 19:16 #7 by wolfsburg (wolfsburg)
Replied by wolfsburg (wolfsburg) on topic Re: Small external aquarium water pump

The Eheim 1046 looks like it might do the job. It was even used for watercooling overclocked CPUs!

Can anyone recommend a source for Eheim in Ireland?

Thanks for all your help.


You are in Galway so Aquapaws
... Peter and Petra there are big Eheim fans!

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15 Feb 2011 19:23 #8 by Acara (Dave Walters)
If it's not important how it looks,how about one of those wee household ornaments with the flowing water,you can get them in some of the cheap shops,and also the diy stores,Atlantic,etc.Just break it open and remove the pump.?

always on the lookout for interesting corys.pm me if you know off any!

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16 Feb 2011 01:31 #9 by joey (joe watson)
dennerle do a small external for nano tanks and it has adjustable flow too. didn;t see flo ratings and dont know where to get them here but it does 30l tanks so i guess flow is low and if you pump upwards it will slow flow more on such a small filter

Location: Portlaoise, Midlands

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