I Need All That Dissolved Oxygen!

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monodon

Feeder Fish
MFK Member
Feb 8, 2009
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Hey all, I'm putting together two 100 gallon, salt-water aquariums (ponds actually), and I've got a topic concerning providing enough aeration.

The water will need to be at 28˚C/82.4˚F, and the salinity will need to be as close to 35ppt as possible, which apparently means that the dissolved oxygen levels are capable of reaching up to 6.42 ppm. I need to hit this maximum because how many shrimp I'll be able to raise depends on providing enough oxygen for them and the beneficial bacteria.

Unfortunately, the website of the place where I'll be getting the air pumps is not loading right now, so I can't describe the different types of air pumps available to me, but, generally, how many watts and what kind of flow rate would I need to achieve this? As soon as the site loads, I can post a link to the list of pumps they have available... Also, which kinds of air stones should I use? :D

Any input on this would be greatly appreciated. :)
 
Hey, thanks for the link, that might come in handy later when we're working outdoors with large ponds.

Right now though, we're experimenting with two 100 gallon indoor ponds, so regular aquarium equipment works just fine. Just curious what people feel is best. ;)

Here's the link to the available air pumps:
http://homepets.ro/index.php?cPath=22_28_59
 
Ahh, also, I'm not asking anyone to do my shopping for me by giving that link, just showing an idea of which different types there are, to help get an idea of how I determine what kinds of wattages and flows would be necessary to get the maximum dissolved oxygen for that much water. :D
 
Isn't this going to vary greatly depending on the airstones you plan on using?

In other words..... You could run a bunch of cheap low resistance airstones or some fancy ones with a much smaller pore size meaning you will need a pump with greater CFM.....

I have no idea if this makes a difference or not.......
 
I'm sure you're right on that, and that it matters a lot. Thanks for the input! :)

I'd imagine the fancier ones with the smaller pores would be more effective at dissolving oxygen, in fact I saw someone mention using a protein skimmer for dissolving oxygen since it has the micro-bubbles when I was searching the forums, but I think using air pumps should work fine for this...

Are ceramic air diffusers any good? The ones on that website mention that they operate with lower pressure because they are hollow, but that they produce a flow of very tiny bubbles...

I think I'm in over my head. :screwy:
 
Check out Aquaticecosystems.com . They have a LOT of info and products in regard to dissolved O2.

If it was me I wouldn't be looking at air pumps but rather a regenerative style blower. Grab one of those and just run a few of the super fine spray bars. I believe the bigger ultra fine ones can suck up to 1cfm...... You'de only need 6-8 to be able to fully harness everything the blower is capable of. The ultra fine ones are supposed to be able to privide like 4 times the 02 of regular stones/bars, apparently many fine bubbles have a LOT more surface area then the larger bubbles emitted by normal stones/bubble bars.
 
What kind of filter are you going to use? If you are building a wet/dry, you can build the bio-tower tall. The taller the better. It would act like a degasser. Removing co2 and adding oxygen. With clean water, this may be all you need.
 
Thanks for the link, DB. I was looking around the tech talk for info but didn't find too much of what I was looking for, but I'm in a hurry 'cause its almost bed-time. I'm hoping to order from a site from this country though due to horrible international shipping rates.

Actually, Wheat, I haven't settled on too much of anything for the filtration. I was thinking to build a smaller reservoir. Building a wet/dry is an idea but I was tending away from it. I noticed a protein skimmer that I was going to look further into, and I assumed a basic canister filter for some biological and a little carbon filtration. I don't have too much room for getting nuts with the filtration. I also am planning on using an aquaculture product called AquaMats as surface area for biological filtration as well as for the larval stages that like that stuff, but that might depend if they'll place that small of an order. I hadn't focused too much on figuring out the filter though yet.

I guess I should say I'm not looking for extreme overkill, since I was reading that usually 3-5ppm is what is targeted for in any kind of aquarium, and the ceiling for dissolved oxygen is closer to 7.

From the site, I was hovering on the Aqua Medic 300, which is a diaphragm air pump which has a maximum capacity of 380 l/h, a maximum pressure of 6.8psi, and consumes 8 watts of power. Is that something that will cover the needs of one 100 gallon pond, or even both, depending on which air stone I select?
 
Forgot to mention, DB, thanks for the suggestion on the regenerative-style blower. Would it be necessary to go with something that sounds really powerful and complex for two 100 gallon ponds?
 
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