diff --git a/aerospike-core/src/commands/buffer.rs b/aerospike-core/src/commands/buffer.rs
index 5f99cd6..40d1d2f 100644
--- a/aerospike-core/src/commands/buffer.rs
+++ b/aerospike-core/src/commands/buffer.rs
@@ -1750,13 +1750,19 @@ impl Buffer {
     }
 
     pub(crate) fn write_geo(&mut self, value: &str) -> usize {
+        // Bin values require flags+ncells prefix
         self.write_u8(0);
-        self.write_u8(0);
-        self.write_u8(0);
+        self.write_i16(0);
         self.write_bytes(value.as_bytes());
         3 + value.len()
     }
 
+    pub(crate) fn write_geo_string(&mut self, value: &str) -> usize {
+        // Query filters use raw GeoJSON string
+        self.write_bytes(value.as_bytes());
+        value.len()
+    }
+
     pub(crate) fn write_timeout(&mut self, val: Option<Duration>) {
         if let Some(val) = val {
             let millis: i32 = (val.as_secs() * 1_000) as i32 + val.subsec_millis() as i32;
@@ -1767,6 +1773,5 @@ impl Buffer {
     #[allow(dead_code)]
     pub(crate) fn dump_buffer(&self) {
         rhexdump!(&self.data_buffer);
-        println!("");
     }
 }
diff --git a/aerospike-core/src/net/connection.rs b/aerospike-core/src/net/connection.rs
index 8810b99..1bbfaf3 100644
--- a/aerospike-core/src/net/connection.rs
+++ b/aerospike-core/src/net/connection.rs
@@ -141,12 +141,12 @@ impl Connection {
     }
 
     pub async fn flush(&mut self) -> Result<()> {
+        let send_buf = &self.buffer.data_buffer;
         match self.conn {
-            Netsocket::Tcp(ref mut conn) => conn.write_all(&self.buffer.data_buffer).await?,
+            Netsocket::Tcp(ref mut conn) => conn.write_all(send_buf).await?,
             #[cfg(feature = "tls")]
-            Netsocket::Tls(ref mut conn) => conn.write_all(&self.buffer.data_buffer).await?,
-        };
-
+            Netsocket::Tls(ref mut conn) => conn.write_all(send_buf).await?,
+        }
         self.refresh();
         Ok(())
     }
diff --git a/aerospike-core/src/query/filter.rs b/aerospike-core/src/query/filter.rs
index 0a424dc..e7d3177 100644
--- a/aerospike-core/src/query/filter.rs
+++ b/aerospike-core/src/query/filter.rs
@@ -69,9 +69,15 @@ impl Filter {
 
     #[doc(hidden)]
     pub fn estimate_size(&self) -> usize {
-        // bin name size(1) + particle type size(1)
-        //     + begin particle size(4) + end particle size(4) = 10
-        self.bin_name.len() + self.begin.estimate_size() + self.end.estimate_size() + 10
+        let begin_size = match &self.begin {
+            Value::GeoJSON(ref s) => s.len(),
+            _ => self.begin.estimate_size(),
+        };
+        let end_size = match &self.end {
+            Value::GeoJSON(ref s) => s.len(),
+            _ => self.end.estimate_size(),
+        };
+        self.bin_name.len() + begin_size + end_size + 10
     }
 
     #[doc(hidden)]
@@ -80,11 +86,27 @@ impl Filter {
         buffer.write_str(&self.bin_name);
         buffer.write_u8(self.value_particle_type.clone() as u8);
 
-        buffer.write_u32(self.begin.estimate_size() as u32);
-        self.begin.write_to(buffer);
+        let begin_size = match &self.begin {
+            Value::GeoJSON(ref s) => s.len(),
+            _ => self.begin.estimate_size(),
+        };
+        buffer.write_u32(begin_size as u32);
+        if let Value::GeoJSON(ref geo_str) = &self.begin {
+            buffer.write_geo_string(geo_str);
+        } else {
+            self.begin.write_to(buffer);
+        }
 
-        buffer.write_u32(self.end.estimate_size() as u32);
-        self.end.write_to(buffer);
+        let end_size = match &self.end {
+            Value::GeoJSON(ref s) => s.len(),
+            _ => self.end.estimate_size(),
+        };
+        buffer.write_u32(end_size as u32);
+        if let Value::GeoJSON(ref geo_str) = &self.end {
+            buffer.write_geo_string(geo_str);
+        } else {
+            self.end.write_to(buffer);
+        }
     }
 }
 
diff --git a/aerospike-core/src/value.rs b/aerospike-core/src/value.rs
index a6cb873..4491ded 100644
--- a/aerospike-core/src/value.rs
+++ b/aerospike-core/src/value.rs
@@ -292,7 +292,7 @@ impl Value {
             Value::Bool(_) => 1,
             Value::List(_) | Value::HashMap(_) => encoder::pack_value(&mut None, self),
             Value::OrderedMap(_) => panic!("The library never passes ordered maps to the server."),
-            Value::GeoJSON(ref s) => 1 + 2 + s.len(), // flags + ncells + jsonstr
+            Value::GeoJSON(ref s) => 1 + 2 + s.len(), // flags + ncells + string
             Value::HLL(ref h) => h.len(),
             Value::Infinity => 0,
             Value::Wildcard => 0,