|Yeast and MLB nutrients|
Protects yeast with specific sterols and polyunsaturated fatty acids for resistance to fermentation stress
Stimulates yeast with vitamins and minerals, maximising viability throughout fermentation
Optimises yeast rehydration with perfect balance and easy uptake of nutrients and protectants
PDF spec sheet
Tried and trusted FERMAID A is a blended complex yeast nutrient that supplies inorganic nitrogen (DAP), organic nitrogen (alpha amino nitrogen derived from yeast extract), key nutrients and inactivated yeast.
It is best to add FERMAID A over two additions. The first addition is made at the end of the lag phase (6 to 12 hours after yeast inoculation) and the second addition is made around 1/3 sugar depletion (the end of exponential growth and the beginning of the stationary phase).
With proper rehydration and handling, the yeast cell population should be at least 4 million cells/mL at inoculation. By the time the second FERMAID A addition is made, this population should have grown to about 100 million cells/mL. It is critical to remember that yeast are still reproducing during the stationary phase, and to do this effectively, especially in high sugar musts, they need oxygen as well as the components of FERMAID A, including nitrogen (for protein synthesis), sterols and fatty acids (for maintaining alcohol resistance and permease activity). In addition, the inactivated yeast cell walls in FERMAID A adsorb medium-chain fatty acids that are toxic to yeast, and provide nucleation sites to help keep the yeast in suspension.
The recommended dosage is as follows:
Yeast food for organic and biodynamic producers derived from 100% natural yeast, containing no DAP or inorganic nitrogen.
Extremely rich source of amino acids and peptides, which are the optimum source of organic nitrogen, as well as providing precursors for many aromatic compounds and limiting the risk of H2S production.
An essential part of any winemaker's toolkit, Cerevit is a pure vitamin blend of Nicotinamide, Calcium Pantothenate, Pyridoxine
Deficiencies are common in Australia's ancient soils and often exacerbated by juice processing such as ion exchange bentonite fining or heatin, and can lead to stuck ferments through limited yeast growth rates and cell numbers. Cerevit added at inoculation is a simple solution to the problem, and when used as directed, will not contribute aroma or flavour.
Oenococcus oeni are fussy, requiring a diverse range of nutrients to grow and subsequently conduct MLF. These nutrients include sugars, organic nitrogen (amino acids and peptides), vitamins (B group and pantothenate), trace elements (Mg, Mn and K) and also organic acids (malic and citric).
OPTI’MALO PLUS is a blend of specific inactivated yeasts, rich in bio-available amino acids, mineral cofactors and vitamins, and also having a high content of parietal polysaccharides.