Yeast Nutrient

[pmolou]

so for my yeast nutrient i usually get some left over yeast cake from prior brews wash it then boil it and then pitch it in with my brew for nutrient

usually around 750ml but recently i did around 1.5L and got a higher OG than expected

expected around 1.065- 1.07 and got 1.08 from hydro test


checked my hydro and its fine

either i didnt stir my wort enough ( i did stir it) or my nutrient has messed with my OG reading

thoughts anyone

 

[Benniee]

so for my yeast nutrient i usually get some left over yeast cake from prior brews wash it then boil it and then pitch it in with my brew for nutrient

usually around 750ml but recently i did around 1.5L and got a higher OG than expected

expected around 1.065- 1.07 and got 1.08 from hydro test


checked my hydro and its fine

either i didnt stir my wort enough ( i did stir it) or my nutrient has messed with my OG reading

thoughts anyone

1.5L seems like a lot of the cake to be adding as a nutrient. There should be a reasonable amount of nutrients in a standard beer anyway (or so I thought).

In the past if I'm brewing something that I know is lacking in nutrients like a mead or a ginger beer then I will add some additional nutrients, or boil up a single packet of old yeast from kits that I wouldn't use anyway.

How many litres were you brewing?

Benniee

 

[newguy]

I think that you added too much yeast which in turn raised your OG. If I add yeast nutrient (mead, cider or perry - rarely beer), I'll add maybe 3 tsp at most. That's about 15ml (I think). 1.5l of yeast slurry is a ridiculous overkill. The thing I'd watch for is yeast autolysis type flavours from adding that much. In low concentrations, I get a distinct flintstones vitamin aroma and flavour (not sure what this is - maybe a B complex vitamin?). In stronger concentrations it can soap-like, fat-like, oily, etc. I hope your beer still turns out okay, but next time really cut down on the boiled yeast - maybe 3-5 tsp at most.

 

[pmolou]

I think that you added too much yeast which in turn raised your OG. If I add yeast nutrient (mead, cider or perry - rarely beer), I'll add maybe 3 tsp at most. That's about 15ml (I think). 1.5l of yeast slurry is a ridiculous overkill. The thing I'd watch for is yeast autolysis type flavours from adding that much. In low concentrations, I get a distinct flintstones vitamin aroma and flavour (not sure what this is - maybe a B complex vitamin?). In stronger concentrations it can soap-like, fat-like, oily, etc. I hope your beer still turns out okay, but next time really cut down on the boiled yeast - maybe 3-5 tsp at most.

just so u guys know not actually 1.5L of actual slurry it was 2 750ml pet bottle i filled with yeast which the eventually slurry dropped out and i only poured in and boiled the liquid which still had heaps of yeast in it

but yer for future defs wont use as much but this beer should turn out alright is a pretty strong brew in flavour and alc content

 

[jimi]

I do what Beenie does. I wouldn't have thought boiled yeast could increase your OG.