Oxygenated Water - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 7 Old 01-20-2010, 03:43 PM Thread Starter
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Oxygenated Water

I want to try this idea and wonder if anyone can give some advice

One of the reasons to change water is to increase oxygen content? And water plants help create more oxygen?

What about this schedule:

Day 1 - Pour some water into gallon containers, put some plants in (java moss, water sprites)
Day 2, 3 - Wait for the chlorine to dissipate, at the same time the plants will be increasing the oxygen in the water?
Day 4 - Water change with Oxygenated Water

Will that be beneficial? Thanks
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post #2 of 7 Old 01-20-2010, 04:19 PM
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The only reason to change water is to get rid of fish poop, and replenish certain minerals in the water. Oxygen enters when there is any surface movement as well as from plants.
So to answer your question, no, you don't have to do that. I add water straight from tap with a dose of Prime which removes chlorine.
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post #3 of 7 Old 01-20-2010, 04:22 PM
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Well, I'm sure if you wanted to, you could, but I usually don't want to have to have water sit out for 4 days before I'm able to do a water change. Most aquarists don't have problems with oxygenated water, probably the ones with planted tanks. To set up plants for the long term in a gallon jar would probably not work, unless you provided fertilizer. Since this post seems to be the reason you joined, or a main reason, let me warn you: seltzer in water will kill fish. It's one of the ways some people do kill fish, when the fish is fatally wounded, but it is regarded as inhumane, since the fish slowly suffocates due to CO2 in the water and a lack of oxygen. But anyway, aquatic plants do better with fish waste, and if you're adding fish waste to plants in a jar of water, you might as well have a new aquarium. Just stick an airstone in the one you've got and future water changes shouldn't be a problem.

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why did you think it was a good idea to keep going over the top of the tank
when you realized you couldn't breathe outside water?
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post #4 of 7 Old 01-20-2010, 07:18 PM
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+1 on mrdemin
You wanna remove waste with the w/c. If you have oxygen issues in your tank then there's something wrong with the amount of plants you have vs amount fish you have.

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post #5 of 7 Old 01-21-2010, 01:08 AM
i'd just put plants in the tank (you don't need anything special to put plants in, maybe just a little fertilizer. lots on the forum about this.

i like your thinking, though. that's why the forum is here...to bounce ideas off other members : )

your filter should be adding enough O2 and that's not really the purpose behind water changes.

p.s. WELCOME to the forum : )

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post #6 of 7 Old 01-21-2010, 03:28 PM
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Couple of thoughts on the whole CO2 and O2 (or is it just O?)

Naturally in nature, there's a balance between the air and water as far as how much O2 and CO2 water will hold in relationship to the air. If the amount of oxygen in water drops below this "normal level" the water will naturally absorb the oxygen from the air to get back to that normal level. Likewise if the amount of oxygen in water goes above this normal level, the water will expel the extra oxygen into the air.

The same holds true for CO2. Excess levels of CO2 in the water will evaporate until the water reaches the equalization level. Low levels of CO2 in water will cause the water to replenish it into the water. I don't know what those levels are exactly but I'm sure you could "google" it.

This exchange of CO2 and oxygen then occurs at the water’s surface. Circulating the water causes the equalizing effect to happen faster because it brings the un-equalized water to the surface.

One misconception about water is that if the level of CO2 is high then the level of oxygen is low. I guess that's because plants and animals take in one and expel the other. But high and/or low levels of each can occur in water at the same time. That why when CO2 is added to the water the fish don’t’ die. The oxygen is still there. But if the CO2 does go beyond a certain point it does poison the fish.

That brings us back to the plants in the containers. Even if the plants added oxygen to the water, it would probably evaporate before the water made it to the tank. Plus plants use oxygen once the lights are out.
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post #7 of 7 Old 01-23-2010, 01:08 AM
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Originally Posted by WisFish View Post
Couple of thoughts on the whole CO2 and O2 (or is it just O?)
Oxygen molecules (O2) dissolve readily in water, so it's O2 rather than ionized oxygen in solution.

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