diff --git a/src/amr/level_initializer/hybrid_level_initializer.hpp b/src/amr/level_initializer/hybrid_level_initializer.hpp
index ec00aa58c..e0ef8386a 100644
--- a/src/amr/level_initializer/hybrid_level_initializer.hpp
+++ b/src/amr/level_initializer/hybrid_level_initializer.hpp
@@ -57,7 +57,7 @@ namespace solver
 
             if (isRegridding)
             {
-                std::cout << "regriding level " << levelNumber << "\n";
+                PHARE_LOG_LINE_STR("regriding level " + std::to_string(levelNumber));
                 PHARE_LOG_START(3, "hybridLevelInitializer::initialize : regriding block");
                 messenger.regrid(hierarchy, levelNumber, oldLevel, model, initDataTime);
                 PHARE_LOG_STOP(3, "hybridLevelInitializer::initialize : regriding block");
diff --git a/src/amr/messengers/hybrid_hybrid_messenger_strategy.hpp b/src/amr/messengers/hybrid_hybrid_messenger_strategy.hpp
index eaf5b115f..3b6a90393 100644
--- a/src/amr/messengers/hybrid_hybrid_messenger_strategy.hpp
+++ b/src/amr/messengers/hybrid_hybrid_messenger_strategy.hpp
@@ -585,7 +585,7 @@ namespace amr
             PHARE_LOG_SCOPE(3, "HybridHybridMessengerStrategy::synchronize");
 
             auto levelNumber = level.getLevelNumber();
-            std::cout << "synchronizing level " << levelNumber << "\n";
+            PHARE_LOG_LINE_STR("synchronizing level " + std::to_string(levelNumber));
 
             // call coarsning schedules...
             magnetoSynchronizers_.sync(levelNumber);
@@ -607,7 +607,7 @@ namespace amr
             auto levelNumber  = level.getLevelNumber();
             auto& hybridModel = static_cast<HybridModel&>(model);
 
-            std::cout << "postSynchronize level " << levelNumber << "\n";
+            PHARE_LOG_LINE_STR("postSynchronize level " + std::to_string(levelNumber))
 
             magSharedNodesRefiners_.fill(hybridModel.state.electromag.B, levelNumber, time);
             elecSharedNodesRefiners_.fill(hybridModel.state.electromag.E, levelNumber, time);
diff --git a/src/amr/multiphysics_integrator.hpp b/src/amr/multiphysics_integrator.hpp
index 78beef907..e6f71d85e 100644
--- a/src/amr/multiphysics_integrator.hpp
+++ b/src/amr/multiphysics_integrator.hpp
@@ -313,8 +313,9 @@ namespace solver
             bool const isRegridding = oldLevel != nullptr;
             auto level              = hierarchy->getPatchLevel(levelNumber);
 
-            std::cout << "init level " << levelNumber << " with regriding = " << isRegridding
-                      << "\n";
+
+            PHARE_LOG_LINE_SS("init level " << levelNumber << " with regriding = " << isRegridding);
+
             PHARE_LOG_START(3, "initializeLevelData::allocate block");
             if (allocateData)
             {
@@ -414,7 +415,7 @@ namespace solver
                                    int const tag_index, bool const /*initialTime*/,
                                    bool const /*usesRichardsonExtrapolationToo*/) override
         {
-            std::cout << "apply gradient detector on level " << levelNumber << "\n";
+            PHARE_LOG_LINE_STR("apply gradient detector on level " + std::to_string(levelNumber));
 
             auto level = hierarchy->getPatchLevel(levelNumber);
             for (auto& patch : *level)
@@ -508,9 +509,9 @@ namespace solver
 
             auto iLevel = level->getLevelNumber();
 
-            PHARE_LOG_LINE_STR("advanceLevel " << iLevel << " with dt = " << newTime - currentTime
-                                               << " from t = " << currentTime
-                                               << " to t = " << newTime);
+            PHARE_LOG_LINE_SS("advanceLevel " << iLevel << " with dt = " << newTime - currentTime
+                                              << " from t = " << currentTime
+                                              << " to t = " << newTime);
 
             auto& solver      = getSolver_(iLevel);
             auto& model       = getModel_(iLevel);
diff --git a/src/core/logger.hpp b/src/core/logger.hpp
index 5e8cb0990..679a6e757 100644
--- a/src/core/logger.hpp
+++ b/src/core/logger.hpp
@@ -15,8 +15,10 @@ constexpr static std::uint8_t LOG_LEVEL = PHARE_LOG_LEVEL;
 #if !defined(NDEBUG) || defined(PHARE_FORCE_DEBUG_DO)
 #define PHARE_LOG_LINE_STR(str)                                                                    \
     std::cout << __FILE__ << ":" << __LINE__ << " - " << str << std::endl;
+#define PHARE_LOG_LINE_SS(s) PHARE_LOG_LINE_STR((std::stringstream{} << s).str());
 #else
 #define PHARE_LOG_LINE_STR(str)
+#define PHARE_LOG_LINE_SS(str)
 #endif
 #define PHARE_LOG_LINE PHARE_LOG_LINE_STR("")