Carbonic maceration: how long?

[zappoid]

Hi everybody!
Last Saturday I started my second winemaking season: I have bought early ripe hybrid grapes Monarch, 110 kg, just couldn't wait anymore! All grapes I divided on three parts: two parts for regular alcoholic fermentation with different yeasts, and third part I put in plastic barrel gased with carbon dioxide and sealed it. The question is when to open it and continue with regular procedures? Average temperature is about 25 Celsius (77 Fahrenheit). Thank you for any tips.

 

[winemanden]

Best keep an eye on that plastic barrel. Unless it's got a safety valve, you may end up with a Bomb!

 

[zappoid]

Best keep an eye on that plastic barrel. Unless it's got a safety valve, you may end up with a Bomb!

Thank you for your care, today I opened it, destemmed and crushed. So far I don't see much difference If I crushed it week before.