diff --git a/advanced-reactor.html b/advanced-reactor.html
index d63f531..d63f71b 100644
--- a/advanced-reactor.html
+++ b/advanced-reactor.html
@@ -23,10 +23,14 @@
         outputs: 1,
         icon: "font-awesome/fa-recycle",
         label: function() {
-            return this.name||"advanced-reactor";
+            return this.name || "advanced-reactor";
         },
         oneditprepare: function() {
-            $(".typed-num").typedInput({
+            $("#node-input-volume").typedInput({
+                type:"num",
+                types:["num"]
+            });
+            $(".concentrations").typedInput({
                 type:"num",
                 types:["num"]
             });
@@ -48,61 +52,61 @@
     <h2> Reactor properties </h2>
     <div class="form-row">
         <label for="node-input-volume"><i class="fa fa-tag"></i> Fluid volume [m3]</label>
-        <input type="text" id="node-input-volume" class="typed-num" placeholder="m3">
+        <input type="text" id="node-input-volume" placeholder="m3">
     </div>
     <h2> Dissolved components </h2>
     <div class="form-row">
         <label for="node-input-S_O_init"><i class="fa fa-tag"></i> Initial dissolved oxygen [g O2 m-3]</label>
-        <input type="text" id="node-input-S_O_init">
+        <input type="text" id="node-input-S_O_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-S_I_init"><i class="fa fa-tag"></i> Initial soluble inert  organics [g COD m-3]</label>
-        <input type="text" id="node-input-S_I_init" class="typed-num">
+        <input type="text" id="node-input-S_I_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-S_S_init"><i class="fa fa-tag"></i> Initial readily biodegrable substrates [g COD m-3]</label>
-        <input type="text" id="node-input-S_S_init" class="typed-num">
+        <input type="text" id="node-input-S_S_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-S_NH_init"><i class="fa fa-tag"></i> Initial ammonium / ammonia [g N m-3]</label>
-        <input type="text" id="node-input-S_NH_init" class="typed-num">
+        <input type="text" id="node-input-S_NH_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-S_N2_init"><i class="fa fa-tag"></i> Initial dinitrogen, released by denitrification [g N m-3]</label>
-        <input type="text" id="node-input-S_N2_init" class="typed-num">
+        <input type="text" id="node-input-S_N2_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-S_NO_init"><i class="fa fa-tag"></i> Initial nitrite + nitrate [g N m-3]</label>
-        <input type="text" id="node-input-S_NO_init" class="typed-num">
+        <input type="text" id="node-input-S_NO_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-S_HCO_init"><i class="fa fa-tag"></i> Initial alkalinity, bicarbonate [mole HCO3- m-3]</label>
-        <input type="text" id="node-input-S_HCO_init" class="typed-num">
+        <input type="text" id="node-input-S_HCO_init" class="concentrations">
     </div>
     <h2> Particulate components </h2>
     <div class="form-row">
         <label for="node-input-X_I_init"><i class="fa fa-tag"></i> Initial inert particulate organics [g COD m-3]</label>
-        <input type="text" id="node-input-X_I_init" class="typed-num">
+        <input type="text" id="node-input-X_I_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-X_S_init"><i class="fa fa-tag"></i> Initial slowly biodegrable substrates [g COD m-3]</label>
-        <input type="text" id="node-input-X_S_init" class="typed-num">
+        <input type="text" id="node-input-X_S_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-X_H_init"><i class="fa fa-tag"></i> Initial heterotrophic biomass [g COD m-3]</label>
-        <input type="text" id="node-input-X_H_init" class="typed-num">
+        <input type="text" id="node-input-X_H_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-X_STO_init"><i class="fa fa-tag"></i> Initial Organics stored by heterotrophs [g COD m-3]</label>
-        <input type="text" id="node-input-X_STO_init" class="typed-num">
+        <input type="text" id="node-input-X_STO_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-X_A_init"><i class="fa fa-tag"></i> Initial autotrophic, nitrifying biomass [g COD m-3]</label>
-        <input type="text" id="node-input-X_A_init" class="typed-num">
+        <input type="text" id="node-input-X_A_init" class="concentrations">
     </div>
     <div class="form-row">
         <label for="node-input-X_TS_init"><i class="fa fa-tag"></i> Initial total suspended solids [g TSS m-3]</label>
-        <input type="text" id="node-input-X_TS_init" class="typed-num">
+        <input type="text" id="node-input-X_TS_init" class="concentrations">
     </div>
 </script>
 
diff --git a/advanced-reactor.js b/advanced-reactor.js
index 20d6081..bd364c8 100644
--- a/advanced-reactor.js
+++ b/advanced-reactor.js
@@ -10,25 +10,35 @@ module.exports = function(RED) {
         const reactor = new Reactor(
             config.volume,
             [
-                config.S_O_init,
-                config.S_I_init,
-                config.S_S_init,
-                config.S_NH_init,
-                config.S_N2_init,
-                config.S_NO_init,
-                config.S_HCO_init,
-                config.X_I_init,
-                config.X_S_init,
-                config.X_H_init,
-                config.X_STO_init,
-                config.X_A_init,
-                config.X_TS_init
+                parseFloat(config.S_O_init),
+                parseFloat(config.S_I_init),
+                parseFloat(config.S_S_init),
+                parseFloat(config.S_NH_init),
+                parseFloat(config.S_N2_init),
+                parseFloat(config.S_NO_init),
+                parseFloat(config.S_HCO_init),
+                parseFloat(config.X_I_init),
+                parseFloat(config.X_S_init),
+                parseFloat(config.X_H_init),
+                parseFloat(config.X_STO_init),
+                parseFloat(config.X_A_init),
+                parseFloat(config.X_TS_init)
             ]
         );
 
         node.on('input', function(msg, send, done) {
-            if (msg.topic == "clock") {
-                reactor.updateState(msg);
+            switch (msg.topic) {
+                case "clock":
+                    reactor.updateState(msg);
+                    break;
+                case "Influx":
+                    reactor.setInflux = msg;
+                    break;
+                case "OTR":
+                    reactor.setOTR = msg;
+                    break;
+                default:
+                    console.log("Unknown topic: " + msg.topic)
             }
 
             if (done) {
diff --git a/dependencies/reactor_class.js b/dependencies/reactor_class.js
index 80aa3b6..a50ca23 100644
--- a/dependencies/reactor_class.js
+++ b/dependencies/reactor_class.js
@@ -9,14 +9,23 @@ class Reactor_CSTR {
         this.asm = new ASM3();
 
         this.Vl = volume; // fluid volume reactor [m3]
-        this.F = 1.0; // fluid debit [m3 d-1]
-        this.C_in = [0., 30., 100., 16., 0., 0., 5., 25., 75., 30., 0., 0., 125.]; // composition influent
-        this.OTR = 100.0; // oxygen transfer rate [g O2 d-1]
+        this.F = 0.0; // fluid debit [m3 d-1]
+        this.C_in = Array(13).fill(0.0); // composition influent
+        this.OTR = 0.0; // oxygen transfer rate [g O2 d-1]
 
         this.currentTime = Date.now(); // milliseconds since epoch [ms]
         this.timeStep = 1/(24*60*15) // time step [d]
     }
 
+    set setInflux(input) { // setter for C_in (WIP)
+        this.F = input.payload.F;
+        this.C_in = input.payload.C_in;
+    }
+
+    set setOTR(input) { // setter for OTR (WIP) [g O2 d-1]
+        this.OTR = input.payload;
+    }
+
     // expect update with timestamp
     updateState(input) {
         let newTime = input.payload;