Inexpensive Introduction of Oxygen?

[Nic]

i think the standard methods is the best bet.... you could just use a high power luft pump or blower motor to force more air into the chamber.... i cant remember where i read it bt i thought pure oxygen affect the ph or something else....

 

[Dr Joe]

I am looking into molding large polycarbonate tanks (400 gallons) as a business. Along with these I would like to recommend filtration systems that produce excellent water quality hence the interest in DO.

I alway seem to notice these ideas crop up when it's very cold out side (especially for long periods) but they're usually from our Canadian friends . j/k

Like everyone is saying, high rates of DO are unnecessary with a few exceptions as Burtess stated and poor water quality. Smaller tanks such as these will do well with standard aeration.

With that size tank, do your customers a service and mold them a 100g W/D system.

You'll find there are quite a few of us in the business in one way or another.

Curious... Rotational or injection molding?

Dr Joe

.

 

[Fish Eat Fish]

this seems like major overkill to me if it is not for some specific fish. I dont think many people will even want one of these systems for keeping any remotely common fish.

 

[aquaventions]

Do you want to super saturate oxygen in the water?
I think this would be useless (I don't know about harmful?), since as long as a fishes minumum O2 level is met, any more would be overkill.

The only time this sounds like it would be usefull is with an overstocked tank with a very small surface area for gas exchange. Also then you would have to think about being able to allow for gas off of CO2 that the fish respire, as that would become a pollutant for sure (carbonic acid, pH effects).

Burt

I'm not trying to oxygenate the water to the extent done in aquaculture. I am trying to provide an optimal level of oxygen for the fish, not just the minimum. There are significant advantages for the fish.

There are a great many things hobbyists do that go beyond the minimum requirements for keeping fish.

 

[aquaventions]

I alway seem to notice these ideas crop up when it's very cold out side (especially for long periods) but they're usually from our Canadian friends . j/k

Like everyone is saying, high rates of DO are unnecessary with a few exceptions as Burtess stated and poor water quality. Smaller tanks such as these will do well with standard aeration.

With that size tank, do your customers a service and mold them a 100g W/D system.

You'll find there are quite a few of us in the business in one way or another.

Curious... Rotational or injection molding?

Dr Joe

.

Injection molding since the other types of molding will not work for this project.

 

[cchhcc]

I'm not trying to oxygenate the water to the extent done in aquaculture. I am trying to provide an optimal level of oxygen for the fish, not just the minimum. There are significant advantages for the fish.

There are a great many things hobbyists do that go beyond the minimum requirements for keeping fish.

Honestly, a basic wet/dry filter will do everything you need --- oxygenation, degassing, nitrification, etc........ Anything else is superfluous.

Dr. Joe and others have posted good information.

 

[duanes]

One of the limiting factors for the amount of oxygen water can hold is temp.
Cold water is saturated to a higher degree than warm.
Water at 80'F will be saturated at @ 5mg/L +/-, while cold water in a trout stream may be 10 or even supersturated.
Oxygen superstaurated water can actually be harmful to some tropical species evolved to live in 5 mg/L O2 levels.
If you plan to keep Tomocichla or Retroculus, extra may be needed, if your keeping Jack Dempseys probably not.
One of the reasons gas bubble syndrom can kill tropicals if water in cold climates if tap water is added straight to a tank without being agitated to release some of the oxygen saturation.

 

[cchhcc]

Good post DuaneS!

 

[Fish Eat Fish]

I do not think that increasing the amount of oxygen in a tank that already has a far sufficient amount will do anything. Worry about a great filtration system and other features that are so much more important than super saturated water.

 

[fishdance]

Stumbled accross this again .... oxygen toxicity is a very real threat. Oxygen can also act as an oxidiser resulting in burns. From a slightly more obscure yet still interesting study, increased levels of dissolved oxygen often does result in slower/lower rates of fish breathing since blood oxygen levels are sufficient but this often causes a build up of other organic wastes since respiration was slowed.

As an aside, when bagging corydoras, eels, bichir, siamese fighters, gouramis, lungfish or any surface breathing species with oxygen for transport, dont deflate ALL the air out of the bag before filling it up with oxygen. The pure oxygen will burn such fish.