SBS Black Currant Mead

Add yeast nutrients at different steps. From Northern Brewer:

Anyone who has ever stirred a fermenting beverage knows the foaming, triggered by the release of CO2, can make one heck of a mess! To help minimize this, you should mix the nutrient blend into ½ cup of must and add it back to the fermenter. Then begin to slowly stir the must to release the main portion of the CO2 gas. After the foaming has subsided you can begin to stir more vigorously. Mix the must well enough to introduce plenty of oxygen into the fermenting must. Oxygen is needed by the yeast throughout the growth phase. Oxidation is not a huge concern until you get past 50 percent sugar depletion.
https://www.northernbrewer.com/blogs/wine-cider-and-mead-making/two-melomels-from-curt-stock

From Fifth Season Gardening: Fining with Gelatin: (per 5 gallons of beer)

Add ¼ to ½ cup of cold filtered water to a sanitized measuring cup
Add ½ teaspoon of gelatin on surface
Let sit for 10-15 minutes to partially dissolve
Heat water to 150-155 °F (I usually do small 5-10 bursts in the microwave. You may also heat the water by adding very small increments of boiled water) DO NOT BOIL THE WATER, you will make Jell-O instead.
Stir and test temp with sanitized thermometer
Pour into fermenter or keg. Use care in avoiding unnecessary cold side oxidation.
Allow 24-48 hours to work its magic prior to packaging or serving.
https://fifthseasongardening.com/fining-your-beer-with-gelatin