Acid blend to help flavor

[MARKOSCUBA]

Can acid blend and tannin be added after the fermatation is over two months into the fermatation to change the taste on strawberry? It was my first try. From then I started using the winemakers recipe handbook, (the purple book)

 

[Wine Maker]

I'm not sure about adding tannin after fermentation. I have only ever added it during the fermentation process. As for the acid blend, yes, you can add it after fermentation to make adjustments.