diff --git a/src/Builtin/DestroyProcessor.cs b/src/Builtin/DestroyProcessor.cs
index d4a1080..c359186 100644
--- a/src/Builtin/DestroyProcessor.cs
+++ b/src/Builtin/DestroyProcessor.cs
@@ -10,6 +10,13 @@
 
     public class DestroyedTable : EcsTable
     {
-        private EcsIncTag _destroyedTag;
+        public readonly EcsPool<tag> isDestroyed;
+
+        public static mem<tag> isDestroyedMem = "isDestroyed";
+
+        public DestroyedTable(ref TableBuilder builder) : base(ref builder)
+        {
+            isDestroyed = builder.Inc(isDestroyedMem);
+        }
     }
 }
diff --git a/src/Utils/EcsMember.cs b/src/EcsMember.cs
similarity index 82%
rename from src/Utils/EcsMember.cs
rename to src/EcsMember.cs
index ee518f3..50bfe59 100644
--- a/src/Utils/EcsMember.cs
+++ b/src/EcsMember.cs
@@ -9,10 +9,8 @@ namespace DCFApixels.DragonECS
     {
         public static class MemberDeclarator
         {
-#if !DCFA_ECS_NO_SANITIZE_CHECKS
-            private static HashSet<string> _usedNames = new HashSet<string>(1024);
-#endif
-            private static EcsMemberBase[] _member = new EcsMemberBase[1024];
+            private static Dictionary<string, EcsMemberBase> _nameMembersPairs = new Dictionary<string, EcsMemberBase>(1024);
+            private static EcsMemberBase[] _members = new EcsMemberBase[1024];
             private static int _typesCount = 0;
             public static EcsMember<T> Declare<T>(string name)
             {
@@ -22,33 +20,43 @@ namespace DCFApixels.DragonECS
                 {
                     throw new EcsFrameworkException($"Maximum available members exceeded. The member of \"{name}\" was not declared");
                 }
-                if (_usedNames.Contains(name))
+                if (_nameMembersPairs.ContainsKey(name))
                 {
                     throw new EcsFrameworkException($"The node with the name \"{name}\" has already been declared");
                 }
-                _usedNames.Add(name);
 #endif
-                if (_typesCount >= _member.Length)
+                if (_typesCount >= _members.Length)
                 {
-                    Array.Resize(ref _member, _member.Length << 1);
+                    Array.Resize(ref _members, _members.Length << 1);
                 }
 
                 EcsMember<T> member = new EcsMember<T>(name, _typesCount);
-                _member[_typesCount++] = member;
+                _nameMembersPairs.Add(name, member);
+                _members[_typesCount++] = member;
 
                 return member;
             }
 
+            public static EcsMember<T> GetOrDeclareMember<T>(string name)
+            {
+                if(_nameMembersPairs.TryGetValue(name,out EcsMemberBase memberBase))
+                {
+                    return (EcsMember<T>)memberBase;
+                }
+
+                return Declare<T>(name);
+            }
+
             public static EcsMember<T> GetMemberInfo<T>(mem<T> member)
             {
 #if DEBUG && !DCFA_ECS_NO_SANITIZE_CHECKS
                 if (member.HasValue == false)
                 {
-                    throw new ArgumentException($"The member argument is empty");
+                    throw new ArgumentException($"The mem<{typeof(T).Name}> argument is empty");
                 }
 #endif
 
-                return (EcsMember<T>)_member[member.UniqueID];
+                return (EcsMember<T>)_members[member.UniqueID];
             }
         }
 
diff --git a/src/Utils/EcsMember.cs.meta b/src/EcsMember.cs.meta
similarity index 100%
rename from src/Utils/EcsMember.cs.meta
rename to src/EcsMember.cs.meta
diff --git a/src/EcsPool.cs b/src/EcsPool.cs
index fc71b96..0860f22 100644
--- a/src/EcsPool.cs
+++ b/src/EcsPool.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using DCFApixels.DragonECS.Reflection;
 using System.Runtime.CompilerServices;
 using UnityEngine;
+using System;
 
 namespace DCFApixels.DragonECS
 {
@@ -74,5 +75,13 @@ namespace DCFApixels.DragonECS
             Add(index);
         }
         #endregion
+
+        #region Equals/GetHashCode
+        public override bool Equals(object obj)
+        {
+            return base.Equals(obj);
+        }
+        public override int GetHashCode() => _type.GetHashCode();
+        #endregion
     }
 }
diff --git a/src/EcsTable.cs b/src/EcsTable.cs
index 603a011..c8a52f9 100644
--- a/src/EcsTable.cs
+++ b/src/EcsTable.cs
@@ -8,7 +8,7 @@ namespace DCFApixels.DragonECS
     {
         internal EcsFilter _filter;
 
-        public EcsTable(ref TableBuilder tableBuilder) { }
+        public EcsTable(ref TableBuilder builder) { }
 
         public EcsFilter Filter
         {
diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index 80407da..59e618c 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -77,13 +77,13 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
-        internal void OnEntityFieldAdd(int entityID, mem<T> chaangedField)
+        internal void OnEntityFieldAdd(int entityID, int changedPool)
         {
 
         }
 
 
-        internal void OnEntityFieldDel(int entityID, EcsMember chaangedField)
+        internal void OnEntityFieldDel(int entityID, int changedPool)
         {
             
         }
@@ -97,7 +97,7 @@ namespace DCFApixels.DragonECS
             internal int IncludeCount;
             internal int ExcludeCount;
             internal int Hash;
-#if DEBUG && !LEOECSLITE_NO_SANITIZE_CHECKS
+#if DEBUG && !DCFAECS_NO_SANITIZE_CHECKS
             bool _built;
 #endif
 
@@ -115,16 +115,16 @@ namespace DCFApixels.DragonECS
                 IncludeCount = 0;
                 ExcludeCount = 0;
                 Hash = 0;
-#if DEBUG && !LEOECSLITE_NO_SANITIZE_CHECKS
+#if DEBUG && !DCFAECS_NO_SANITIZE_CHECKS
                 _built = false;
 #endif
             }
 
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            public Mask Inc<T>(EcsMember member) where T : struct
+            public Mask Inc<T>(mem<T> member) where T : struct
             {
-                var poolId = _world.GetPool<T>().GetId();
-#if DEBUG && !LEOECSLITE_NO_SANITIZE_CHECKS
+                var poolId = _world.GetPool(member).ID;
+#if DEBUG && !DCFAECS_NO_SANITIZE_CHECKS
                 if (_built) { throw new Exception("Cant change built mask."); }
                 if (Array.IndexOf(Include, poolId, 0, IncludeCount) != -1) { throw new Exception($"{typeof(T).Name} already in constraints list."); }
                 if (Array.IndexOf(Exclude, poolId, 0, ExcludeCount) != -1) { throw new Exception($"{typeof(T).Name} already in constraints list."); }
@@ -134,14 +134,11 @@ namespace DCFApixels.DragonECS
                 return this;
             }
 
-#if UNITY_2020_3_OR_NEWER
-            [UnityEngine.Scripting.Preserve]
-#endif
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            public Mask Exc<T>(EcsMember member) where T : struct
+            public Mask Exc<T>(mem<T> member) where T : struct
             {
-                var poolId = _world.GetPool<T>().GetId();
-#if DEBUG && !LEOECSLITE_NO_SANITIZE_CHECKS
+                var poolId = _world.GetPool(member).ID;
+#if DEBUG && !DCFAECS_NO_SANITIZE_CHECKS
                 if (_built) { throw new Exception("Cant change built mask."); }
                 if (Array.IndexOf(Include, poolId, 0, IncludeCount) != -1) { throw new Exception($"{typeof(T).Name} already in constraints list."); }
                 if (Array.IndexOf(Exclude, poolId, 0, ExcludeCount) != -1) { throw new Exception($"{typeof(T).Name} already in constraints list."); }
diff --git a/src/INFO.txt b/src/INFO.txt
index 67f0469..a6001cd 100644
--- a/src/INFO.txt
+++ b/src/INFO.txt
@@ -1,2 +1,3 @@
 Мервтый мир - значение byte 255, зарезервированный адишник мира, все что ссылается на мертвый мир считается так же мертвым.
 
+DCFAECS_NO_SANITIZE_CHECKS - отвключение дополнительных проверок
\ No newline at end of file
diff --git a/src/Primitives/mem.cs b/src/Primitives/mem.cs
index 3d4c8d0..4261c8b 100644
--- a/src/Primitives/mem.cs
+++ b/src/Primitives/mem.cs
@@ -56,7 +56,7 @@ namespace DCFApixels.DragonECS
         public static bool operator !=(in mem<T> left, in mem<T> right) => !left.Equals(right);
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static implicit operator mem<T>(string name) => new mem<T>(MemberDeclarator.Declare<T>(name).UniqueID);
+        public static implicit operator mem<T>(string name) => new mem<T>(MemberDeclarator.GetOrDeclareMember<T>(name).UniqueID);
         #endregion
     }
 }
diff --git a/src/TableBuilder.cs b/src/TableBuilder.cs
index 3cb3682..17f48cf 100644
--- a/src/TableBuilder.cs
+++ b/src/TableBuilder.cs
@@ -12,15 +12,15 @@ namespace DCFApixels.DragonECS
 
         public EcsPool<T> Cache<T>(mem<T> member)
         {
-
+            throw new NotImplementedException();
         }
         public EcsPool<T> Inc<T>(mem<T> member)
         {
-
+            throw new NotImplementedException();
         }
         public EcsPool<T> Exc<T>(mem<T> member)
         {
-
+            throw new NotImplementedException();
         }
     }
 }