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1) DIY Co2

2) Pressurized co2

3) Seachem Fluorish Excel

*All these calculations are based on a 29 gallon.

It never occured to me about the costs of DIY co2.

-A rough estimate for sugar brings up the total of ~$9 for sugar yearly, totaling to ~$18 for sugar every two years.

-Add the additional ~$10 or so for the costs of hunting and finding some supplies. (rough estimate!)

-Add in the $3 yeast, which lasts a long time. Each yeast packet has 26 servings @ 1/4 teaspoon.

Excel:

-When buying in bulk, a 2 liter excel will cost ~$25 and will last 1.8 years if dosed every day, or 3.6 years if

done every OTHER day.

-If dosed every day, it would cost you 3 cents each time.

-If you buy a 4 liter, it would cost you 2 cents each time you dose.

-Drawback is that the organic carbon source is not as effective for plant growth as co2.

Pressurized:

I'm not too familiar with it, but a decent one cost $170 or so for a system.

Now, the most important factor: time

With pressurized, you don't lose much time out of your life.

With excel, a few seconds to squirt in a few milliliter in your tank.

With DIY co2, that time climbs exponentially.

You decide what's best for you for the future.

My choice for right now is excel. I don't regret DIY co2 because it was a really fun learning experience. Soon I'm

going pressurized