Sercani,
All good advice re the film. As far as adding bentonite I would advise against it for a red. All of my reds over time settle out any solids. Let time work its magic, ie 12-14 months.
I did by mistake 10 years ago. To chardonnay. Should have been 1/4 tsp and I put in 1 tsp. 240 ppm. So, fermentation of the juice was a struggle until I added hydrogen peroxide to get the pm’s down. It turned out to be a drinkable wine but not a good wine.
Just splash rack big. Aim the outgoing hose against the side of a large open fermenter. If you have a piece of copper tubing, shine it up with steel wool, and splash rack over it. Don’t leave the tubing in very long. Or, use redulees. Just remedy it early before it converts to mercaptins.
In 2020 I went on a 2 week wine cruise up the Danube to Bavaria. But, the day before I went on a half day wine tour to the Etyek wineries only about an hour away. We visited 4 wineries in the afternoon and finished with a really fun dinner at the last small winery. Awesome tour.
The malic acid percentage will not change relative to the many other acids in your wine. If the conditions are right and you haven’t yet bottled your older non m-l wines, you could add the bacteria now.
A bit of exposure to oxygen at this stage is a good thing - keeps the wine from being reductive. But yes, add the bacteria while the ambient temperature is still fairly warm.
Yep, ice bombs are the way to go. Keep rotating them from the must to the freezer. You have a lot more temperature control with ice bombs than with dry ice. Freeze a variety of sizes.