diff --git a/Models/RecipeSearchNode.cs b/Models/RecipeSearchNode.cs
--- a/Models/RecipeSearchNode.cs
+++ b/Models/RecipeSearchNode.cs
@@ -13,7 +13,16 @@ namespace DesertPaintCodex.Models
         private int _nextReagentPos;
         public int ReagentCount => _nextReagentPos;
 
-        public uint MinConcentration { get; set; } = 10;
+        private uint _minConcentration = 10;
+        public uint MinConcentration
+        {
+            get => _minConcentration;
+            set
+            {
+                if (value < 10) value = 10;
+                _minConcentration = value;
+            }
+        }
 
         private readonly bool[] _reagentInUse;
         private readonly List<Reagent> _costSortedReagents;
@@ -37,6 +46,7 @@ namespace DesertPaintCodex.Models
             get => _maxReagents;
             set
             {
+                if (value < 1) value = 1;
                 _maxReagents = value;
                 CurrentWeights = new uint[_maxReagents];
             }