diff --git a/crates/ethcore/src/client/client.rs b/crates/ethcore/src/client/client.rs
index 9410070b3..43e52b75e 100644
--- a/crates/ethcore/src/client/client.rs
+++ b/crates/ethcore/src/client/client.rs
@@ -1560,7 +1560,7 @@ impl Client {
         }
     }
 
-    /// Garbage collect invalid servive transactions from the transaction queue based on the given block header.
+    /// Garbage collect invalid service transactions from the transaction queue based on the given block header.
     pub fn garbage_collect_in_queue(&self) {
         let machine = self.engine().machine();
 
@@ -1589,7 +1589,7 @@ impl Client {
                     match machine.verify_transaction(tx.signed(), block_header, self) {
                         Ok(_) => true,
                         Err(e) => {
-                            info!(target: "client", "collected garbage transaction from {:?}: {:?} reason: {:?}", tx.signed().sender(), tx.signed().hash, e);                   
+                            trace!(target: "client", "collected garbage transaction from {:?}: {:?} reason: {:?}", tx.signed().sender(), tx.signed().hash, e);                   
                             false
                         },
                     });
diff --git a/crates/transaction-pool/src/pool.rs b/crates/transaction-pool/src/pool.rs
index abea527ba..caa4d9c43 100644
--- a/crates/transaction-pool/src/pool.rs
+++ b/crates/transaction-pool/src/pool.rs
@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use log::{info, trace, warn};
+use log::{debug, trace, warn};
 use std::{
     collections::{hash_map, BTreeSet, HashMap},
     slice,
@@ -236,11 +236,12 @@ where
         }
     }
 
-    /// Performs garbage collection of the pool for free service transactions.
-    /// Removes transaction that are not valid anymore.
-    /// The process executes listener calls.
-    pub fn garbage_collect<F: Fn(&T) -> bool>(&mut self, service_transaction_check: F) {
-        if self.best_transactions.is_empty() {
+    /// Performs garbage collection of the pool for free service transactions (zero gas transactions).
+    /// Only checks lowest nonce.
+    /// inject "should_keep_function" to decide.
+    /// The process executes listener calls for invalid transactions.
+    pub fn garbage_collect<F: Fn(&T) -> bool>(&mut self, should_keep_function: F) {
+        if self.transactions.is_empty() {
             return;
         }
 
@@ -249,7 +250,7 @@ where
         for sender in self.transactions.iter() {
             for tx in sender.1.iter_transactions() {
                 if tx.transaction.has_zero_gas_price() {
-                    if service_transaction_check(&tx.transaction) {
+                    if !should_keep_function(&tx.transaction) {
                         txs_to_remove.push(tx.hash().clone());
                     }
                 } else {
@@ -264,7 +265,7 @@ where
             return;
         }
 
-        info!(
+        debug!(
             "Garbage collection: removing invalid {} service transactions from pool.",
             txs_to_remove.len()
         );