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Use just the Seltzer water. It is nothing but water and CO2. I have used it. I had one, one liter bottle, about 1/3 bottle for 3days. I had some issues with what I believe were diatoms. Cleaned the tank right up. Might just be coincidence, but who knows. :)
 

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T. Amano did it way back, but theres a possible catch

Give me your thoughts, maybe?

This reminds me of an excerpt in Takashi Amano's book "Nature Aquarium World" book one page# 54.

He used 5 bottles on a large tank and it worked but...

He was concerned about the amount of sodium chloride in the carbonated water.

It seems that most of these carb. waters have small amounts of NaCl is potentially harmful to the fauna.

So I guess you might be able to do more research on this (NaCl).

IMO is more cost effective to do a basic diy 20oz paintball co2 setup. there is a sticky here on it and very good one too
 

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This reminds me of an excerpt in Takashi Amano's book "Nature Aquarium World" book one page# 54.

He used 5 bottles on a large tank and it worked but...

...
...

IMO is more cost effective to do a basic diy 20oz paintball co2 setup. there is a sticky here on it and very good one too
I also recall that Amano used carbonated water back when he started playing with CO2.

I think it would be an expensive way to get CO2 into the water. As mentioned, pressurized CO2 would be the cheaper alternative in the long run.

He was concerned about the amount of sodium chloride in the carbonated water.

It seems that most of these carb. waters have small amounts of NaCi is potentially harmful to the fauna.

So I guess you might be able to do more research on this (NaCi).
Just a small note that sodium chloride is NaCl (lower case L) not an i.

I wonder how much sodium chloride can actually be in carbonated water; I would rather worry about the price first...
 

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I wonder how much sodium chloride can actually be in carbonated water; I would rather worry about the price first...
And also beginning to purchase bottles on a regular basis, each morning add them to the tank, no thanks!

A cheap alternative to pressurized CO2 is the yeast CO2, works well for a 20-30 gallons tank.

Michel.
 

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yes Capital C lower case L for chlorine

Just a small note that sodium chloride is NaCl (lower case L) not an i.

I wonder how much sodium chloride can actually be in carbonated water; I would rather worry about the price first...
Na=Sodium Cl=Chlorine yep exactly

I believe those bottles contain around 1%-2% NaCl, but if you pour a liter of selzer water to top off and boost C02 levels you are adding close to half an ounce of sodium chloride or more and I would wonder what that would do to delicate freshwater plants and fuana
 

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The CO2 you add with seltzer water quickly leaves the water at the water surface. That means you will have wild fluctuations in concentration of CO2 in the water, a good invitation to BBA to begin growing in the tank.

I use DIY CO2 on a 65 gallon low light tank, and find it is very effective. It wouldn't work for high light tanks but for low and possibly medium light tanks it does fine. I have a pair of 2 liter bottles, staggering the replenishing of the bottles, one per week.
 
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