I rack it off as soon as it reaches the target gravity then add clearing agent, the 2 part stuff, then rack again a week later and it stops dead and crystal clear.
WOW.. Saw this on the Vigo websiteCross flow filtration will have an enormous relevance to people who are trying to retain a high level of residual sugar. You can take a cider at 1020 which is really milky looking and stop it in its tracks.'Just what I need
On Sunday, 8 January 2017 20:11:45 UTC, Tony Lovering wrote:Why is racking less efficient in vats? What would be the max size of vat you would use racking for stabilisation? I was going to go for 500 ltr tanks but might use a filter for the last rack. I see there are sheet filters and also cross flow filters. What would you recommend?
Claude, I'm not looking to retain sugar with these batches but I did follow your approach with an early rack to try and have a long slow ferment. I'm actually concerned my pH is too HIGH, measured around 3.8 (sadly I only have cheap strips and no way to measure TA). Some of my test batches with the same juice actually seem to be going through MLF, and one of my filler 1/2 gallons is cloudy and bubbling again looking a lot like MLF. Do you recommend I try to stop it, how? Should I consider adding malic acid? when?
For the H2S, I never would have though racking to reduce yeast would help but it makes sense as you describe it so simply. I've also read splash racking a bit may help, should I be worried about oxidation? I'm going to pick up some Fermaid O tomorrow although I'm worried it will push fermentation faster. I suppose it's more important to deal with the H2S than speed at this point. Although the test batches had the same problem when active and have totally cleared up.
Is Fermaid K the same as Fermaid O?
Claude, test batches are up in my apartment above >20 C. They fully cleared but the wild yeast and an un-sulfited test kept bubbling, got hazy, and raised pH.
I did a first racking on day 17 when the fermentation speed reached 700 FSU,
but since then fermentation has continued roughly between 200 and 300 FSU. I didn't think about the multiple rackings that Claude describes, but will rack tomorrow on day 31 at SG of 1.012 and hope for the best.
Nevertheless, I suspect this cider is going to go completely dry.
I was wondering whether, when using a cultured yeast (which I use in part to help reduce the acidity in my cider), it would have been a good idea to use a lower quantity of yeast than the manufacturer recommends when I initially pitched the yeast. Would this have resulted in fewer yeast cells and a slower fermentation rate? Or would the speed have picked up to the same level once the fermentation got underway?
Claude, what could be a good amount of fermaid K to add to limit h2s production of a fermenting cider that shows some signs?
PS - I believe those trees are about 20 yr old bush trees without additions/fertilizer.
UK/southWales
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