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Follow directions carefully.
When hydrogen sulfide is formed in
detectible quantities, it will usually be toward the end of fermentation. You should
smell your young wine during the first fermentation. If the rotten egg smell is evident, you
should pre-treat the wine immediately, when the problem
is first discovered, before using reduless and/or copper sulfate.
1. Rack your wine even if it is still
fermenting. If the smell hasn't disappeared in 24 hours, rack again. Aerate and
2. Dose the wine
with the recommended amount of a yeast nutrient. If you have Reduless, use that for the nutrient
at this point.
Dissolve Reduless in 10 times its weight in water. Add
immediately to tank mixing well. If prepared in advance, re-suspend the product
prior to its addition. Additions can be made during pump-overs or during tank
agitations/mixings. Recommended contact time is 48-72 hours after homogenization.
Rack off or filter the wine when treatment is complete.
4. Reduless can be dosed twice, if the first dosage
improves but does not clear up the problem.
3. You may also bubble an inert gas
such as carbon dioxide or nitrogen through the wine.
4. If the above steps do not correct
the problem then Copper Sulfate is a serious consideration.
Use copper sulfate as soon as possible after the fermentation. You
should only add enough to cure the problem as excess copper will cause hazes and at
higher levels will be toxic.
Avoid adding excess copper. Use bench tests to
determine the minimum effective dose. (See below.)
If in doubt about excess copper, have the wine
tested. If the wine takes on a bitterly astringent taste you have excess
if you have used the maximum amount and the problem
still exist, add ascorbic acid at the rate of 1/4 gram per gallon. Rack again,
filtration is recommended.
1. Make three or four samples of wine of equal measured volume of
approximately a quart or 750 ml. Label them "A, B, C, and D" for instance. Do not reduce the
size of the sample for the below instructions.
2. Add 1 drop of copper sulfate to sample A.
Add 2 drops to
Add 4 drops to sample C and
Add 8 drops to sample D.
Stir or shake these wines,
cover and let sit until the next day.
3. Check the samples and determine the minimum dose which corrected the problem. Add at the
same rate to your wine. NOTE: If the
4 drop sample corrected the problem and the 2 drop sample did NOT, add 1 more drop to the 2
drop sample to create a 3 drop sample. Shake and wait again. It is important to determine the
minimum amount you truly need.
1 milliliter = 20 drops
1 ounce = about 600 drops
4. After the addition of copper sulfate to your wine, fine it with bentonite or sparkolloid,
both of which will help remove excess copper ions. Rack the wine off of this sediment as soon
as it has settled out. Filter as desired.
5. If you have used the maximum amount and the problem
still exist, add ascorbic acid at the rate of 0.1 to 1/4 gram per gallon.
http://www.bcawa.ca/winemaking/h2s.htm MORE, read this page!
WARNING: COPPER SULFATE IS
POISONOUS. Use it according to directions and do not exceed minimum
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CONVERSION METRIC TO OUNCES TO DETERMINE HOW MUCH TO ORDER
There are 29.6 ml per fluid ounce. Correct me if I am wrong.
A 750 ml standard wine bottle is 25.34 ounces. (750 divided by
One gallon (128 ounces) is (128 X 29.6ml) or 3788.8 ml. Don't you
just hate all of this?
If the wine will be treated at the rate of 1 drop or 2 drops per 750
ml, then you need to figure out how many bottles you have in your batch.
A one gallon batch of 3788.8 ml is 5.05 bottles (3788.8 divided by
The rate would be 1 to 8 drops per bottle depending on your test
If 1 drop per bottle will work, you will need 5 drops to treat 5
bottles or 1 gallon.
Eight (8) drops per bottle would need 40 drops to treat 5 bottles or
1 gallon of wine at the maximum dose. Got it?
So, if you have 100 gallons to treat: 100 gal X 128 ounces (per
gallon) X 29.6ml = (equals) 378880 ml divided by 750 ml bottle = 505 bottles to
The 1 drop per bottle treatment would require 505 X 1 or 505 drops.
As there are 20 drops in an ml. you would need (505 divided by 20) or
If the 8 drops per bottle is the dose then you would need 505 X 8
drops or 4040 drops divided by 20 (20 drops in an ml) or 202 ml or how many ounces???
That would be 202 divided by (29.6 ml = 1 ounce) 29.6 or 6.8 ounces.
Now, you probably want us to figure out how much you need, right? Oh