Too much Fermax
Moderator: Site Moderator
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
Too much Fermax
Hey guys.
So for my first wash, I made a big mistake and added way too much Femax. I’m a long time all grain beer brewer and never had to add nutrients because I’ve always used grain. This wash was a Honey Brown Sugar wash. It’s almost done fermenting according to the SG readings. It taste great….but a few minutes later I got this bitterness that last on the palette for a long time. I tasted the Fermax to be sure and I get that same bitterness.
Will this bitterness from the excessive Fermax be left behind during distilling? I mean it’s basically different types of salt right?
Any help is mighty appreciated!
So for my first wash, I made a big mistake and added way too much Femax. I’m a long time all grain beer brewer and never had to add nutrients because I’ve always used grain. This wash was a Honey Brown Sugar wash. It’s almost done fermenting according to the SG readings. It taste great….but a few minutes later I got this bitterness that last on the palette for a long time. I tasted the Fermax to be sure and I get that same bitterness.
Will this bitterness from the excessive Fermax be left behind during distilling? I mean it’s basically different types of salt right?
Any help is mighty appreciated!
- subbrew
- Distiller
- Posts: 1511
- Joined: Thu Jan 21, 2021 1:40 pm
- Location: West of the Mississippi
Re: Too much Fermax
Are you running it through a pot or column? If you are putting it through a column I would expect it to clean up. Pot distilling for flavor and I don't know.
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
Re: Too much Fermax
Pot with a thumper
- shadylane
- Master of Distillation
- Posts: 11456
- Joined: Sat Oct 27, 2007 11:54 pm
- Location: Hiding In the Boiler room of the Insane asylum
- NZChris
- Master of Distillation
- Posts: 13881
- Joined: Tue Apr 23, 2013 2:42 am
- Location: New Zealand
Re: Too much Fermax
Run it, do a good job of the cuts, then tell us if it was too much.
- Yummyrum
- Global moderator
- Posts: 8809
- Joined: Sat Jul 06, 2013 2:23 am
- Location: Fraser Coast QLD Aussie
Re: Too much Fermax
Was curious what Fermax tastes like . Don’t have it here .
But it contains DAP , epsom salts ( magnesium Sulphate ) Vitamins and Calcium salts .
Went out to shed and had a sticky finger . DAP tastes very salty ….. it’s really salty and quite nice …iff’n like me , you like a lot if salt on your food .
But Epsom Salts are very bitter and puckers up the mouth . …. But watch it , too much will un-pucker your pooper . 
Not sure what Particular Calcium Salts are used
But I looked around and we have “Damp rid moisture chrystals “ which are Calcium Chloride and in the shed I found a bag of Plaster of Paris which is Calcium Sulphate :
The calcium chloride was also salty but had a bitter after taste while the Calcium Sulphate was …. Nothing .tasted absolutely nothing .
So while I have nothing real in the way of useful answers , I can understand why you might have got that bitter after taste , if not from the Epsom salts , maybe Calcium Chloride .
I do doubt it will carry over .
Having said that ,a fully fermented out sugar wash will taste a bit bitter . ….certainly sour .
But it contains DAP , epsom salts ( magnesium Sulphate ) Vitamins and Calcium salts .
Went out to shed and had a sticky finger . DAP tastes very salty ….. it’s really salty and quite nice …iff’n like me , you like a lot if salt on your food .


Not sure what Particular Calcium Salts are used
But I looked around and we have “Damp rid moisture chrystals “ which are Calcium Chloride and in the shed I found a bag of Plaster of Paris which is Calcium Sulphate :
The calcium chloride was also salty but had a bitter after taste while the Calcium Sulphate was …. Nothing .tasted absolutely nothing .
So while I have nothing real in the way of useful answers , I can understand why you might have got that bitter after taste , if not from the Epsom salts , maybe Calcium Chloride .
I do doubt it will carry over .
Having said that ,a fully fermented out sugar wash will taste a bit bitter . ….certainly sour .
My recommended goto .
https://homedistiller.org/wiki/index.ph ... ion_Theory
https://homedistiller.org/wiki/index.ph ... ion_Theory
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
-
- Master of Distillation
- Posts: 3306
- Joined: Sat Oct 24, 2015 11:59 am
- Location: Pacific Northwest
Re: Too much Fermax
A cup! Oh god.
Assuming you got copper in that still I would expect you are going to get a lot of blue/green output in you low wines. Multiple threads on that.
Assuming you got copper in that still I would expect you are going to get a lot of blue/green output in you low wines. Multiple threads on that.
Otis’ Pot and Thumper, Dimroth Condenser: Pot-n-Thumper/Dimroth
Learning to Toast: Toasting Wood
Polishing Spirits with Fruitwood: Fruitwood
Badmotivator’s Barrels: Badmo Barrels
Learning to Toast: Toasting Wood
Polishing Spirits with Fruitwood: Fruitwood
Badmotivator’s Barrels: Badmo Barrels
- shadylane
- Master of Distillation
- Posts: 11456
- Joined: Sat Oct 27, 2007 11:54 pm
- Location: Hiding In the Boiler room of the Insane asylum
Re: Too much Fermax
1 - 1.5tsp per gallon is the recommended dosage.
Looks like you used around 2x more than needed. I'd let the wash finish and run it.
Whatever you do, don't adjust the pH upwards or blue distillate is a real possibility.
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
Re: Too much Fermax
- bilgriss
- Distiller
- Posts: 1900
- Joined: Fri Feb 05, 2016 2:28 pm
- Location: Southeast-ish.
Re: Too much Fermax
Way too much, yes. I agree you should run it and see.
One thing I'd expect if this was stressful to the yeast, you may have some off flavors. That's common in "turbo" yeasts which include way too much nutrient to boost alcohol percentage potential, often at the expense of flavor. I doubt the nutrient flavors carry over, but you may or may not have fermentation byproducts which do.
Or it might be awesome. Run it!
One thing I'd expect if this was stressful to the yeast, you may have some off flavors. That's common in "turbo" yeasts which include way too much nutrient to boost alcohol percentage potential, often at the expense of flavor. I doubt the nutrient flavors carry over, but you may or may not have fermentation byproducts which do.
Or it might be awesome. Run it!
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
Re: Too much Fermax
I’ll let you know on Sunday!
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
Re: Too much Fermax
Update, all worries for nothing. It turned out great. No bitterness at all in the final product.
- Yummyrum
- Global moderator
- Posts: 8809
- Joined: Sat Jul 06, 2013 2:23 am
- Location: Fraser Coast QLD Aussie
Re: Too much Fermax
Glad to hear it Celticway

My recommended goto .
https://homedistiller.org/wiki/index.ph ... ion_Theory
https://homedistiller.org/wiki/index.ph ... ion_Theory
- NZChris
- Master of Distillation
- Posts: 13881
- Joined: Tue Apr 23, 2013 2:42 am
- Location: New Zealand
-
- Novice
- Posts: 28
- Joined: Thu Feb 01, 2024 10:37 am
Re: Too much Fermax
- NZChris
- Master of Distillation
- Posts: 13881
- Joined: Tue Apr 23, 2013 2:42 am
- Location: New Zealand
Re: Too much Fermax
I use bakers yeast for grains and rums and am happy with the results.
- shadylane
- Master of Distillation
- Posts: 11456
- Joined: Sat Oct 27, 2007 11:54 pm
- Location: Hiding In the Boiler room of the Insane asylum
Re: Too much Fermax
Even though more fermax was used than recommended, normally fermax is used as a supplement for low nutrient wine. A sugar wash isn't just low in nutrients, it's almost devoid of anything.