diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 7dfa38d5a6..e2bb248d5a 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -2452,6 +2452,7 @@ public class Blocks{
         //TODO rename
         chemicalCombustionChamber = new ConsumeGenerator("chemical-combustion-chamber"){{
             requirements(Category.power, with(Items.graphite, 40, Items.tungsten, 40, Items.oxide, 40f, Items.silicon, 30));
+            researchCost = with(Items.graphite, 2000, Items.tungsten, 1000, Items.oxide, 10, Items.silicon, 1500);
             powerProduction = 9f;
             consumeLiquids(LiquidStack.with(Liquids.ozone, 2f / 60f, Liquids.arkycite, 40f / 60f));
             size = 3;
diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index c19e71f560..df75d9ab95 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -260,14 +260,14 @@ public class ErekirTechTree{
                 });
 
                 node(diffuse, Seq.with(new OnSector(lake)), () -> {
-                    node(sublimate, () -> {
-                        node(titan, Seq.with(new OnSector(basin)), () -> {
-                            node(afflict, Seq.with(new OnSector(basin)), () -> {
+                    node(sublimate, Seq.with(new OnSector(marsh)), () -> {
+                        node(titan, Seq.with(new OnSector(marsh)), () -> {
+                            node(afflict, Seq.with(new OnSector(marsh)), () -> {
 
                             });
                         });
 
-                        node(disperse, Seq.with(new OnSector(basin)), () -> {
+                        node(disperse, Seq.with(new OnSector(marsh)), () -> {
 
                         });
                     });