Dissolved oxygen and algae

[Cake_Boss]

What is the proper balance of dissolved oxygen to inhibit algal growth? I'm looking for a percentage or mg/l measurement. I've been feverishly browsing the web for the answer. No hard numbers, just people saying that oxygenation helps inhibit algal growth.

This started from me wanting to do an UAS, which led to how much oxygen is too much, which led to finding that low dissolved oxygen causes an algal bloom.

So, what's the numbers?

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[Cake_Boss]

Re: Dissolved oxygen and algae

Although I have found no evidence of actual inhibition, I did find that 8ppm is equilibrium in rivers.

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[JuanGutz]

Good thing to learn and let me know if you build a UAS I'm interested undoing it aswell.

 

[cadre]

This would be great to know. I'm sure there are wildlife and environmental impact studies out there that have recorded what the content is in various parts of the ocean. Finding that info could be tricky but at least it would give you a starting point. Hmmm....I'll have to ask around and report back.

 

[that0neguy1126]

Don't think I have ever seen anything related to this. But have never really looked either. Interested to know what you find out.

 

[Cake_Boss]

Re: Dissolved oxygen and algae

I'm thinking about getting a DO meter to find out. Kinda pricey for a curiosity project though. I did find out that there is a point where you can have too much DO in the water, fish get some swim bladder thing (thing=I forgot what is was specifically)

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[Andrew_bram]

Re: Dissolved oxygen and algae

Isn't the bladder thing common in angels

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[Cake_Boss]

Re: Dissolved oxygen and algae

Isn't the bladder thing common in angels

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No idea, sounds like I've got some reading to do....

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[Andrew_bram]

Re: Dissolved oxygen and algae

Get. Hat tank circulating. While you do that reading.

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[cadre]

So, after looking around and talking to some people, it sounds like the DO in most of our reef tanks is probably high enough to inhibit algae growth. I can't find a well established upper limit, and I'm having a hard time finding anything in mg/l. Now I'm intrigued, so I will keep looking.

For what it's worth, NODC has DO readings from around the world.

 

[Haulin Oates]

Dissolved oxygen and algae

I wonder if this is where h2o2 comes into play with algae problems.

 

[Ghosty]

Maybe. Hydrogen Peroxide increases the DO, does the same thing in our blood, heheh. Here is where it can be tricky though:

In the presence of light, respiration and photosynthesis can occur simultaneously in algae. However, the respiration rate is low compared with the photosynthesis rate, resulting in a net consumption of carbon dioxide and production of oxygen. In the absence of light, algal respiration continues while photosynthesis stops, resulting in a net consumption of oxygen and production of carbon dioxide.

 

[Cake_Boss]

Re: Dissolved oxygen and algae

So, in theory, could we keep a cryptic sump full of algae to combat low pH issues during winter? We'd just need to export the nutrients that the dying algae will release? So a setup like DJKMS would be optimal?

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[Cake_Boss]

Anyone know the answer yet?

 

[SkyShark]

So i'm not sure how this affects PH exactly, but there is a device called an Oxydator that releases hydrogen peroxide into the system to raise oxygen levels. Albert Thiel is a big proponent of it. I researched it last year a bit, but never got one. There are quite a few threads on the national boards with a ton of detail about it. maybe something worth checking out.

 

[SynDen]

So this sounds like a question that SantaMonicaHelp might be able to answer, maybe shot him a pm or post up on his turf scrubber thread

 

[zombie]

Anyone have a reference that low DO inhibits algae growth. I have always been under the impression that low CO2 and low nutrients will inhibit algae growth and low DO is just a byproduct of decaying algae once the bloom is near its peak.

 

[Cake_Boss]

Darn, on backorder. I don't feel like a diy atm.

Vince, got any o2 kits?

 

[Cake_Boss]

Anyone have a reference that low DO inhibits algae growth. I have always been under the impression that low CO2 and low nutrients will inhibit algae growth and low DO is just a byproduct of decaying algae once the bloom is near its peak.

The DO in question is higher, not lower.

The reason I asked initially is beacuse the SIL is an engineer and she was doing a project with river/lake algae. She said that DO was a factor in algal growth. I doubt it will be published since this was govt work.

 

[CRW Reef]

Hmmmmmm I was actually just researching a daily maintenance dose of H2o2 (hydrogen peroxide) for algae control yesterday. Lol no I dont have any major algae issues I was actually just wanting to reduce film algae so I have to clean my glass less

Came across this thread on R2R about using it to control dinoflagellates and it seems to work amazing at knocking it down and destroying it. They also touch on maintenance dosing in this thread too

http://www.reef2reef.com/forums/ree...gellates-my-experience-h2o2-reefing-tool.html