- 4 Feb 2010
The text that's quoted was originally written by George Farmer for another forum, a few years ago.
Here's the original link - http://www.fishforums.net/index.php?/to ... ser-guide/
I'll find out what volume of water the Nutrafin bottle holds so the mixture can be used on other containers. It may be worth getting just the Nutrafin bottle of ebay as it has the right size fitting on the screw lid for the co2 hose.
I'll also find how much sugar will fill the Nutrafin bottle to 'the first line'
Anyway on with the mixture.
Here's a basic guide to using the popular Nutrafin yeast-based CO2 units, based on my own experience.
1. Fill canister with regular granulated sugar to the first line.
2. Add 1/2 teaspoon of dried yeast (available from supermarket).
3. No need for "Stabiliser" unless you have v. soft tap water.
4. Top up to second line with tepid (approx 30C) tap water.
6. Fix lid tightly.
7. Attach tubing tightly.
8. Watch the bubbles appear after 10 to 30 minutes.
Ambient temp. affects bubble rate, cold = less output, warm = more output.
More yeast = more CO2 for shorter time.
Less yeast = less CO2 for longer time.
1 teaspoon of yeast will give you around 30 bubbles per min. for about 7 days. This should be good for up to a 100 l. / 30 gal. tank.
Aim for 30ppm CO2. Change mixture regularly to avoid unstable/low CO2, this causes algae. Test for CO2 using 4dKH drop checker.
Clean ladders may clog bubbles up for a while. The bubbles will run up smooth after a few hours or so.
Use multiple units for larger tanks. Change mixtures alternately for stable CO2.
Also I'll add myself that I've used ladders, air stones and normal ceramic deffusers. I found the ceramic to be best but bare in mind I do use a stong mix( 1 teaspoon of yeast ) but as George stated this last a shorter amount of time but will have more pressure.
Another question I have seen is people having issues with using soft water in the Nutrafin canister.
This is overcome by adding 1 teaspoon of bi-carb of soda per 1/2 teaspoon of yeast.