diff --git a/src/etcp.c b/src/etcp.c
index ba045162..5c2e8595 100644
--- a/src/etcp.c
+++ b/src/etcp.c
@@ -216,7 +216,8 @@ int etcp_send(struct ETCP_CONN* etcp, const void* data, uint16_t len) {
     
     // Create queue entry - this allocates ll_entry + data pointer
 
-    struct ETCP_FRAGMENT* pkt = memory_pool_alloc(etcp->rx_pool);
+
+    struct ETCP_FRAGMENT* pkt = queue_data_new_from_pool(etcp->rx_pool);
     if (!pkt) {
         DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "etcp_send: failed to allocate queue entry");
         memory_pool_free(etcp->instance->data_pool, packet_data);
@@ -264,8 +265,16 @@ static void input_queue_cb(struct ll_queue* q, void* arg) {
     struct ETCP_CONN* etcp = (struct ETCP_CONN*)arg;
     struct ETCP_FRAGMENT* in_pkt = queue_data_get(q);
 
+    if (!in_pkt) {
+        DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "input_queue_cb: cannot get element (pool=%p etcp=%p)", etcp->inflight_pool, etcp);
+        queue_resume_callback(q);
+        return;
+        }
+
     DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "input_queue_cb: processing ETCP_FRAGMENT %p (seq=%u, len=%u)", in_pkt, in_pkt->seq, in_pkt->ll.size);
 
+    memory_pool_free(etcp->rx_pool, in_pkt);// перемещаем из rx_pool в inflight_pool
+
     // Create INFLIGHT_PACKET
     struct INFLIGHT_PACKET* p = memory_pool_alloc(etcp->inflight_pool);
     if (!p) {
@@ -433,6 +442,7 @@ struct ETCP_DGRAM* etcp_request_pkt(struct ETCP_CONN* etcp) {
         dgram->data[ptr++]=dly;
         dgram->data[ptr++]=dly>>8;
         DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "etcp_request_pkt: add ACK N%d dTS=%d", ack_pkt->seq, dly);
+        queue_data_free(ack_pkt);
 
         if (inf_pkt && inf_pkt->ll.size+ptr>=etcp->mtu-10) break;// pkt len (надо просчитать точнее включая все заголовки)
         if (ptr>500) break;
@@ -512,7 +522,7 @@ void etcp_output_try_assembly(struct ETCP_CONN* etcp) {
         // Simply move ETCP_FRAGMENT from recv_q to output_queue - no data copying needed
         // Remove from recv_q first
         queue_remove_data(etcp->recv_q, rx_pkt);
-        
+
         // Add to output_queue using the same ETCP_FRAGMENT structure
         if (queue_data_put(etcp->output_queue, rx_pkt, next_expected_id) == 0) {
             delivered_bytes += rx_pkt->ll.size;
@@ -591,8 +601,7 @@ void etcp_ack_recv(struct ETCP_CONN* etcp, uint32_t seq, uint16_t ts, uint16_t d
     etcp->bytes_sent_total += acked_pkt->ll.size;
     etcp->ack_packets_count++;
 
-    DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "etcp_ack_recv: removed packet seq=%u from wait_ack, unacked_bytes now %u", 
-                seq, etcp->unacked_bytes);
+    DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "etcp_ack_recv: removed packet seq=%u from wait_ack, unacked_bytes now %u", seq, etcp->unacked_bytes);
 
     if (acked_pkt->pkt_data) {
         memory_pool_free(etcp->instance->data_pool, acked_pkt->pkt_data);
@@ -642,7 +651,7 @@ void etcp_conn_input(struct ETCP_DGRAM* pkt) {
 
                 if (len>=5) {
                     // формируем ACK
-                    struct ACK_PACKET* p = memory_pool_alloc(etcp->instance->ack_pool);
+                    struct ACK_PACKET* p = queue_data_new_from_pool(etcp->instance->ack_pool);
                     uint32_t seq=data[1] | (data[2]<<8) |  (data[3]<<16) |  (data[4]<<24);
                     p->seq=seq;
                     p->pkt_timestamp=pkt->timestamp;
@@ -657,7 +666,7 @@ void etcp_conn_input(struct ETCP_DGRAM* pkt) {
                         DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "etcp_conn_input: adding packet seq=%u to recv_q (last_delivered_id=%u)", seq, etcp->last_delivered_id);
                         // отправляем пакет в очередь на сборку
                         uint8_t* payload_data = memory_pool_alloc(etcp->instance->data_pool);
-                        struct ETCP_FRAGMENT* rx_pkt = memory_pool_alloc(etcp->rx_pool);
+                        struct ETCP_FRAGMENT* rx_pkt = queue_data_new_from_pool(etcp->rx_pool);
                         rx_pkt->seq=seq;
                         rx_pkt->timestamp=pkt->timestamp;
                         rx_pkt->pkt_data=payload_data;
diff --git a/src/etcp.h b/src/etcp.h
index fe596215..43f9a0b3 100644
--- a/src/etcp.h
+++ b/src/etcp.h
@@ -77,7 +77,7 @@ struct ETCP_CONN {
     uint64_t peer_node_id;         // Peer node ID
 
 // ============ Processing incoming data to be sent by ETCP
-    struct ll_queue* input_queue;  // Incoming packets to send
+    struct ll_queue* input_queue;  // Incoming packets to send (storage: ETCP_FRAGMENT / rx_pool)
 
     // Inflight очереди (2 шт) - пока пакет в статусе inflight - к нему прикрепляется struct INFLIGHT_PACKET
     struct memory_pool*     inflight_pool;     // память для inflight очередей
@@ -90,7 +90,7 @@ struct ETCP_CONN {
 
     void (*link_ready_for_send_fn)(struct ETCP_CONN*);// функцию которую должен вызвать драйвер линка при готовности линка принимать данные
 
-    struct ll_queue* output_queue; // Assembled outgoing packets
+    struct ll_queue* output_queue; // Assembled outgoing packets (storage: ETCP_FRAGMENT / rx_pool)
 
 
     // IDs and state
diff --git a/src/utun_instance.c b/src/utun_instance.c
index e03ec1a6..3c794806 100644
--- a/src/utun_instance.c
+++ b/src/utun_instance.c
@@ -214,6 +214,13 @@ void utun_instance_destroy(struct UTUN_INSTANCE *instance) {
         instance->ack_pool = NULL;
     }
     
+    // Cleanup data pool
+    if (instance->data_pool) {
+        DEBUG_INFO(DEBUG_CATEGORY_MEMORY, "[INSTANCE_DESTROY] Destroying data pool");
+        memory_pool_destroy(instance->data_pool);
+        instance->data_pool = NULL;
+    }
+    
     // FINALLY destroy uasync (after all resources are cleaned up)
     if (instance->ua) {
         DEBUG_INFO(DEBUG_CATEGORY_MEMORY, "[INSTANCE_DESTROY] Destroying uasync instance");
diff --git a/tests/test_etcp_100_packets b/tests/test_etcp_100_packets
index 91105b4d..e0f2d801 100755
Binary files a/tests/test_etcp_100_packets and b/tests/test_etcp_100_packets differ