diff --git a/src/main/java/com/sparrowwallet/sparrow/AppServices.java b/src/main/java/com/sparrowwallet/sparrow/AppServices.java
index 960fcf48..f35dbb4d 100644
--- a/src/main/java/com/sparrowwallet/sparrow/AppServices.java
+++ b/src/main/java/com/sparrowwallet/sparrow/AppServices.java
@@ -83,8 +83,10 @@ public class AppServices {
     private static final String TOR_DEFAULT_PROXY_CIRCUIT_ID = "default";
 
     public static final List<Integer> TARGET_BLOCKS_RANGE = List.of(1, 2, 3, 4, 5, 10, 25, 50);
-    public static final List<Long> FEE_RATES_RANGE = List.of(1L, 2L, 4L, 8L, 16L, 32L, 64L, 128L, 256L, 512L, 1024L);
+    public static final List<Long> LONG_FEE_RATES_RANGE = List.of(1L, 2L, 4L, 8L, 16L, 32L, 64L, 128L, 256L, 512L, 1024L, 2048L, 4096L, 8192L);
+    public static final List<Long> FEE_RATES_RANGE = LONG_FEE_RATES_RANGE.subList(0, LONG_FEE_RATES_RANGE.size() - 3);
     public static final double FALLBACK_FEE_RATE = 20000d / 1000;
+    public static final double TESTNET_FALLBACK_FEE_RATE = 1000d / 1000;
 
     private static AppServices INSTANCE;
 
@@ -660,15 +662,19 @@ public class AppServices {
 
     public static Double getDefaultFeeRate() {
         int defaultTarget = TARGET_BLOCKS_RANGE.get((TARGET_BLOCKS_RANGE.size() / 2) - 1);
-        return getTargetBlockFeeRates() == null ? FALLBACK_FEE_RATE : getTargetBlockFeeRates().get(defaultTarget);
+        return getTargetBlockFeeRates() == null ? getFallbackFeeRate() : getTargetBlockFeeRates().get(defaultTarget);
     }
 
     public static Double getMinimumFeeRate() {
         Optional<Double> optMinFeeRate = getTargetBlockFeeRates().values().stream().min(Double::compareTo);
-        Double minRate = optMinFeeRate.orElse(FALLBACK_FEE_RATE);
+        Double minRate = optMinFeeRate.orElse(getFallbackFeeRate());
         return Math.max(minRate, Transaction.DUST_RELAY_TX_FEE);
     }
 
+    public static double getFallbackFeeRate() {
+        return Network.get() == Network.MAINNET ? FALLBACK_FEE_RATE : TESTNET_FALLBACK_FEE_RATE;
+    }
+
     public static Map<Integer, Double> getTargetBlockFeeRates() {
         return targetBlockFeeRates;
     }
diff --git a/src/main/java/com/sparrowwallet/sparrow/control/FeeRangeSlider.java b/src/main/java/com/sparrowwallet/sparrow/control/FeeRangeSlider.java
index 0777ad6d..1347b9b0 100644
--- a/src/main/java/com/sparrowwallet/sparrow/control/FeeRangeSlider.java
+++ b/src/main/java/com/sparrowwallet/sparrow/control/FeeRangeSlider.java
@@ -22,10 +22,14 @@ public class FeeRangeSlider extends Slider {
         setShowTickMarks(true);
         setBlockIncrement(Math.log(1.02) / Math.log(2));
 
-        setLabelFormatter(new StringConverter<Double>() {
+        setLabelFormatter(new StringConverter<>() {
             @Override
             public String toString(Double object) {
-                return Long.toString(FEE_RATES_RANGE.get(object.intValue()));
+                Long feeRate = LONG_FEE_RATES_RANGE.get(object.intValue());
+                if(isLongFeeRange() && feeRate >= 1000) {
+                    return feeRate / 1000 + "k";
+                }
+                return Long.toString(feeRate);
             }
 
             @Override
@@ -35,6 +39,12 @@ public class FeeRangeSlider extends Slider {
         });
 
         updateTrackHighlight();
+
+        valueProperty().addListener((observable, oldValue, newValue) -> {
+            if(newValue != null) {
+                updateMaxFeeRange(newValue.doubleValue());
+            }
+        });
     }
 
     public double getFeeRate() {
@@ -42,7 +52,23 @@ public class FeeRangeSlider extends Slider {
     }
 
     public void setFeeRate(double feeRate) {
-        setValue(Math.log(feeRate) / Math.log(2));
+        double value = Math.log(feeRate) / Math.log(2);
+        updateMaxFeeRange(value);
+        setValue(value);
+    }
+
+    private void updateMaxFeeRange(double value) {
+        if(value >= getMax() && !isLongFeeRange()) {
+            setMax(LONG_FEE_RATES_RANGE.size() - 1);
+            updateTrackHighlight();
+        } else if(value == getMin() && isLongFeeRange()) {
+            setMax(FEE_RATES_RANGE.size() - 1);
+            updateTrackHighlight();
+        }
+    }
+
+    private boolean isLongFeeRange() {
+        return getMax() > FEE_RATES_RANGE.size() - 1;
     }
 
     public void updateTrackHighlight() {
@@ -76,7 +102,7 @@ public class FeeRangeSlider extends Slider {
     private Map<Integer, Double> getTargetBlocksFeeRates() {
         Map<Integer, Double> retrievedFeeRates = AppServices.getTargetBlockFeeRates();
         if(retrievedFeeRates == null) {
-            retrievedFeeRates = TARGET_BLOCKS_RANGE.stream().collect(Collectors.toMap(java.util.function.Function.identity(), v -> FALLBACK_FEE_RATE,
+            retrievedFeeRates = TARGET_BLOCKS_RANGE.stream().collect(Collectors.toMap(java.util.function.Function.identity(), v -> getFallbackFeeRate(),
                     (u, v) -> { throw new IllegalStateException("Duplicate target blocks"); },
                     LinkedHashMap::new));
         }
@@ -98,6 +124,9 @@ public class FeeRangeSlider extends Slider {
 
     private int getPercentageOfFeeRange(Double feeRate) {
         double index = Math.log(feeRate) / Math.log(2);
+        if(isLongFeeRange()) {
+            index *= ((double)FEE_RATES_RANGE.size() / (LONG_FEE_RATES_RANGE.size())) * 0.99;
+        }
         return (int)Math.round(index * 10.0);
     }
 }
diff --git a/src/main/java/com/sparrowwallet/sparrow/wallet/SendController.java b/src/main/java/com/sparrowwallet/sparrow/wallet/SendController.java
index 59b2e95f..6ec16afa 100644
--- a/src/main/java/com/sparrowwallet/sparrow/wallet/SendController.java
+++ b/src/main/java/com/sparrowwallet/sparrow/wallet/SendController.java
@@ -4,6 +4,7 @@ import com.google.common.eventbus.Subscribe;
 import com.samourai.whirlpool.client.whirlpool.beans.Pool;
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.drongo.KeyPurpose;
+import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.drongo.SecureString;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.address.InvalidAddressException;
@@ -243,6 +244,8 @@ public class SendController extends WalletFormController implements Initializabl
 
     private boolean overrideOptimizationStrategy;
 
+    private boolean updateDefaultFeeRate;
+
     @Override
     public void initialize(URL location, ResourceBundle resources) {
         EventManager.get().register(this);
@@ -757,6 +760,10 @@ public class SendController extends WalletFormController implements Initializabl
         blockTargetFeeRatesChart.select(defaultTarget);
         setFeeRangeRate(defaultRate);
         setFeeRate(getFeeRangeRate());
+        if(Network.get().equals(Network.MAINNET) && defaultRate == getFallbackFeeRate()) {
+            //Update the selected fee rate once fee rates have been received
+            updateDefaultFeeRate = true;
+        }
     }
 
     private Long getFeeValueSats() {
@@ -821,7 +828,7 @@ public class SendController extends WalletFormController implements Initializabl
     private Map<Integer, Double> getTargetBlocksFeeRates() {
         Map<Integer, Double> retrievedFeeRates = AppServices.getTargetBlockFeeRates();
         if(retrievedFeeRates == null) {
-            retrievedFeeRates = TARGET_BLOCKS_RANGE.stream().collect(Collectors.toMap(java.util.function.Function.identity(), v -> FALLBACK_FEE_RATE,
+            retrievedFeeRates = TARGET_BLOCKS_RANGE.stream().collect(Collectors.toMap(java.util.function.Function.identity(), v -> getFallbackFeeRate(),
                     (u, v) -> { throw new IllegalStateException("Duplicate target blocks"); },
                     LinkedHashMap::new));
         }
@@ -860,7 +867,7 @@ public class SendController extends WalletFormController implements Initializabl
 
     private Double getMinimumFeeRate() {
         Optional<Double> optMinFeeRate = getTargetBlocksFeeRates().values().stream().min(Double::compareTo);
-        Double minRate = optMinFeeRate.orElse(FALLBACK_FEE_RATE);
+        Double minRate = optMinFeeRate.orElse(getFallbackFeeRate());
         return Math.max(minRate, Transaction.DUST_RELAY_TX_FEE);
     }
 
@@ -1451,6 +1458,11 @@ public class SendController extends WalletFormController implements Initializabl
             setFeeRatePriority(getFeeRangeRate());
         }
         feeRange.updateTrackHighlight();
+
+        if(updateDefaultFeeRate) {
+            setDefaultFeeRate();
+            updateDefaultFeeRate = false;
+        }
     }
 
     @Subscribe