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Power Adapter question
http://byap.backyardmagazines.com/forum/viewtopic.php?f=8&t=12739		 Page 1 of 1
Author:  tcshad [ May 22nd, '12, 10:50 ]
Post subject:  Power Adapter question
I want to run a 12V DC 25W air Pump. Am I right in my calculations that I need a power pack that gives out ~12V at ~2.1 amps to power this pump?

Any other suggestions on how to cheaply aerate the water well? I'd prefer to go overkill on aeration than have fish dying on me. I figure it'll also help with my cycling and bacteria growth.
Author:  Troutman [ May 22nd, '12, 10:56 ]
Post subject:  Re: Power Adapter question
What sort of pump is it??
My experience of 12 volt air pumps is that they are not designed for 24/7 use and they also dont seem to last long.
How big is your tank and what species of fish do you intend to keep?
Author:  tcshad [ May 22nd, '12, 11:19 ]
Post subject:  Re: Power Adapter question
Tank will be a full IBC with just the top cut open. I am assuming trout but considering I keep getting delays on getting the system built I'm not sure I'll even have fish in the next 2-3 months... Especially since I want to fishless cycle.

I want to stock pretty heavy once I get it cycled... that's why I've already expanded from 1 growbed to 3 as having the fish is more my primary attraction rather than veggies.

I was thinking this http://www.guppy saquariumproducts.com.au/air-pumps/dc-12v-air-pumps/hailea-aco-003-dc-12v-air-pump/prod_1543.html

Or then again this is looking good and I might just have to cross my fingers and hope power doesn't fail

http://www.guppys aquariumproducts.com.au/air-pumps/electromagnetic-piston-pump/electromagnetic-air-pump-40l/min-outputs-aco-02/prod_577.html

Not sure what the rule is on direct linking so i've broken the links. Remove the space.
Author:  Troutman [ May 22nd, '12, 11:29 ]
Post subject:  Re: Power Adapter question
That 12 volt pump is only suitable as a backup or for transporting fish not for 24/7 use. They are very noisy and wouldnt probably last a week running non stop.

That 240 volt pump at 40 watts is a bit of overkill for one IBC even if you were running trout. I'd be looking at something around 15 - 20 watts max.
Author:  tcshad [ May 22nd, '12, 11:36 ]
Post subject:  Re: Power Adapter question
cheers, I'll look into the smaller 240v pumps then
Author:  Food&Fish [ May 22nd, '12, 14:22 ]
Post subject:  Re: Power Adapter question
tcshad wrote:
cheers, I'll look into the smaller 240v pumps then

But still go electromagnetic mine ran for 5 years and they were second hand
Author:  earthbound [ May 22nd, '12, 16:47 ]
Post subject:  Re: Power Adapter question
Yeah, also watch the fact of AC vs DC, most power packs / transformers are 12 V AC, you need to then convert to DC..
Author:  nih [ May 22nd, '12, 19:53 ]
Post subject:  Re: Power Adapter question
As Gavin said those 12V air pumps are noisey. I have one and I used to run it four times a day on a timer for about 1 1/2 hrs. Decided to go for a 60L/min electromagnectic 240v pump instead and run it 24/7 but it is still a little on the big side for my 2000 L of fish tank (5 seperate tanks).

You can get a suitable 12 VDC power supply though, i would go for at least a 3A one with that pump though to allow some overhead.
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