diff -r 7f69b43e6084 -r 3cbd81ea9391 www/js/log_fermentation.js
--- a/www/js/log_fermentation.js	Sat Jan 19 17:31:43 2019 +0100
+++ b/www/js/log_fermentation.js	Sat Jan 19 20:42:11 2019 +0100
@@ -89,7 +89,7 @@
 		 colorScheme: 'scheme01',
 		 seriesGroups: [
 		 	{
-				type: "spline",
+				type: "area",
 				valueAxis: {
 					minValue: 0,
 					maxValue: 100,
@@ -98,7 +98,7 @@
 				},
 				series: [
 			 		{ dataField: "cooler", lineWidth: 1, displayText: "Cool %", opacity: 0.4 },
-			 		{ dataField: "heater", lineWidth: 1, displayText: "Heat %", opacity: 0.4 }
+			 		{ dataField: "heater", lineWidth: 1, displayText: "Heat %", opacity: 0.3 }
 			 	]
 		 	},
 			{