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Flow Rate Backup Air Pump
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Author:  Noogieloaf [ Dec 3rd, '18, 19:19 ]
Post subject:  Flow Rate Backup Air Pump

Hi all
I'm still at the planning stage and thinking about backup options for power outages.

Assuming I have a typical chop and flip IBC setup with say 12 table-ready jade perch in it, what kind of flow rate of air am I going to need to keep my jades alive on a typical Brisbane summer's day of say 35 degrees celsius, assuming I'm only aerating and not pumping any water?

Cheers
Nigel

Author:  earthbound [ Dec 4th, '18, 11:06 ]
Post subject:  Re: Flow Rate Backup Air Pump

Not really that much to keep them alive. I think the little ac/dc pumps we used were only 4l/m and they have saved some fishy butts during power outages. Of course bigger is nicer.

Author:  Terra [ Dec 4th, '18, 12:12 ]
Post subject:  Re: Flow Rate Backup Air Pump

If you have periods of no pumping good idea to still circulate the water , rather than just a air stone in a corner , a simple "airlift" will bring the water up off the bottom of the tank .

Pic shows airlines in pipe that goes to bottom of tank and circulates the water vertically

I would get something like this for your air pump

https://www.ebay.com.au/itm/Hailea-V-10 ... SwQVdZ4YpB

I have two 20 watt pumps the same make as these , strong pumps that will push water down deep .

Problem with the little aquarium pumps is they don't push down into much water depth .

Ive used them in the airlift pipe successfully

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Author:  Gunagulla [ Dec 4th, '18, 12:33 ]
Post subject:  Re: Flow Rate Backup Air Pump

I just run my air pumps in the middle, no need for air-lift pipes to get radial circulation. Water rises with the air from 25cm air discs about 1/3 of the way down in the FT and spreads out radially across the top, and goes back down the sides and across the bottom to the middle, helping to move any solids to the SLO.

10-15lpm should be enough to circulate the water and provide aeration in an IBC in hot weather, so long as you don't have too many fish in it. It's better to have a bit too much aeration than not enough!

Author:  Noogieloaf [ Dec 4th, '18, 14:25 ]
Post subject:  Re: Flow Rate Backup Air Pump

Thanks for the feedback, guys :)

I was thinking of getting two (for redundancy) 720L/h air pumps with battery backup and splitting the output of each across 3 IBCs. That should give me a backup of 480L/h per IBC and still 240L/h per IBC if one of them fails during the power outage.

The pump I'm looking at is the Hopar LD-10000 (https://www.ebay.com.au/itm/Aqua-Aquarium-Fish-Tank-AC-DC-Lithium-Battery-Silent-Air-Pump-4-Outlet-720L-H-/221855769301?hash=item33a7a262d5)

I'll have to investigate the pros and cons of air-lift

Cheers
Nigel

Author:  Gunagulla [ Dec 4th, '18, 14:30 ]
Post subject:  Re: Flow Rate Backup Air Pump

I'd be checking the actual flow rate when on battery power emergency mode ... "pulsing" suggests the rate is somewhat lower.

>> While the pump is in emergency mode it will continue to pulse air into the aquarium giving you up to 40hours of oxygen supply. Once the power returns the pump will automatically return to AC power and exit emergency mode and supply full oxygen to the aquarium while recharging the lithium battery in preparation for the next power outage.

Author:  joblow [ Dec 5th, '18, 06:16 ]
Post subject:  Re: Flow Rate Backup Air Pump

Nigel I run all my air through a 250mm rubber diffuser like Gunagulla, the backup air is a 12v HAILEA-ACO 003 compressor, running off a 12v 45ah battery, charged by a trickle charger. I don't leave the trickle charger turned on, I found leaving it on 24/7 reduced the battery life. I only turn it on after a power outage, and then turn it off again after 48 hours.

The 12v backup compressor is connected to run through the same 250mm rubber diffuser in the fish tank, but sits idle until a power outage. The a backup safety switch I built using a 12v headlight relay, powered by an old mobile phone charger, It operates off 12 volts and not 240 volts like some on the market, it's a safer option.

The main air supply is a 240v 120L HAILEA air pump, I also run a 240v 70L HAILEA air pump as a backup up for the main pump, and both run 24/7.

I run everything off the 120L & 70L HAILEA's, that includes air to the MBBF, degassing tank, mineralisation tank, 2 x wicking beds, and a small duckweed tank. The backup 12v HAILEA-ACO 003 compressor handles all of that without any problems during a power outage.

Don't buy cheap air pumps, the little extra money good quality pumps cost are worth the extra dollars.

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Author:  Noogieloaf [ Dec 11th, '18, 15:55 ]
Post subject:  Re: Flow Rate Backup Air Pump

Thanks for sharing, Joblow. That's a formidable looking setup.

I've gone in a different direction, though.

I've bought 2 IBCs. My plan is to link them at their drain taps and then have the bed above each FT drain into the other FT, forming one integrated system rather than two independent ones.

I've gone for 2 battery-backed-up 4-outlet air pumps which will each put air into both tanks. This way, if I have a power outage and one pump fails, I'll still be getting some aeration into each tank.

I've followed the redundancy theme into my water pumps too. I've gone with four pumps totalling 2300l/h so that if I have one pump fail I still will have a minimum of 1700l/h across the two tanks until I can pop down to the local hardware and pick up a replacement. The pumps have 2-3 warranty and so I figure that with the redundancy in my planned setup should keep me out of trouble.

Hopefully I'll get a chance to put it all together over Christmas.

Cheers
Nigel

Author:  joblow [ Dec 12th, '18, 16:35 ]
Post subject:  Re: Flow Rate Backup Air Pump

All sounds good Nigel, I like the idea of running more than one pump, it stops you losing fish if a single pump breaks down, that's what I do, I wouldn't have it any other way.

Noogieloaf wrote:
Hi all
I'm still at the planning stage and thinking about backup options for power outages.

Assuming I have a typical chop and flip IBC setup with say 12 table-ready jade perch in it, what kind of flow rate of air am I going to need to keep my jades alive on a typical Brisbane summer's day of say 35 degrees celsius, assuming I'm only aerating and not pumping any water?

Cheers
Nigel


For your backup air I'd plan for a 12v HAILEA-ACO 003 compressor, running off a 12v 45ah battery.

Nigel if you need the circuit diagram for the back up switch, PM me.

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