My chiller build

[GCPHomebrew]

I think the salt will be the way to get lower temps. I ran the pump an additional 15 minutes and the brew only dropped to 68.5. The ice was melted though. That's where the salt comes in.

 

[GCPHomebrew]

View attachment ImageUploadedByHome Brew1433862594.605240.jpg

 

[GCPHomebrew]

View attachment ImageUploadedByHome Brew1433895339.355644.jpgView attachment ImageUploadedByHome Brew1433895366.068128.jpg

 

[GCPHomebrew]

With salt on the ice 68.5 in 8 minutes

 

[GCPHomebrew]

First 5-7 gallons out are hot so I don't recirculate those.