Is there a fix?

[MX450]

My situation pertains to a stalled wash.
Ingredients/equipment are: Still spirits Whiskey yeast.
Imperial Table Sugar
Tap water.
6.5 gallon plastic bucket with lid
5 gallon bucket with lid
plastic wrap

About 7 days ago I started a plain sugar wash where I used 5 gallons of water and 13.5 lbs of table sugar.( I now know it was too much and has since been corrected but it was only 2.7 lb. sugar/gal) Once the sugar was dissolved and temp was dropped to 86. The ph was dropped to 4.0 as this is what the AMG enzyme calls for. 55g of yeast was then pitched when the temp got to bout 85deg. My starting OG was 1.1032 so I placed the lid on it and plastic wrapped the top and installed the airlock.added starsan

Yesterday the wash had stalled with an internal temp of 77 deg. so a bit more reading told me that I need to add more water to the wash. I found that if I split the wash into 2 vessels and add 1.5 gallons of 4.0 ph water to each that was at 80deg and mixed them so that I would now have 8 gallons of water in 13.5 lbs of sugar and a total volume of 9.5 gallons ( now giving me 1.69 lb/gallon)thus reviving my yeast colony. I did this and now my SG was 1.068. I re-wrapped both vessels with plastic wrap, installed air locks and added starsan.

Things started to come alive in the 5 gallon bucket but the 6.5 gallon bucket not so much.

Im wondering if there is anything I can do or add to restart my yeast or are they dead?

Thanks MX