Created two tank prefabs

src/dark/core/prefab/fluids/FilteredTank.java

@@ -0,0 +1,58 @@
+package dark.core.prefab.fluids;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraftforge.fluids.Fluid;
+import net.minecraftforge.fluids.FluidStack;
+import net.minecraftforge.fluids.FluidTank;
+
+/** Tank that has a filter on the fluid ids it will accept
+ * 
+ * @author DarkGuardsman */
+public class FilteredTank extends FluidTank
+{
+    private List<Integer> fluidIds = new ArrayList<Integer>();
+    boolean gas = true;
+    boolean liquid = true;
+
+    public FilteredTank(int capacity, int... fluidIds)
+    {
+        this(capacity, true, true, fluidIds);
+    }
+
+    public FilteredTank(int capacity, boolean gas, boolean liquid, int... fluidIds)
+    {
+        super(capacity);
+        this.gas = gas;
+        this.liquid = liquid;
+        for (int id : fluidIds)
+        {
+            this.fluidIds.add(id);
+        }
+    }
+
+    public FilteredTank(FluidStack stack, int capacity)
+    {
+        super(stack, capacity);
+    }
+
+    public FilteredTank(Fluid fluid, int amount, int capacity)
+    {
+        super(fluid, amount, capacity);
+    }
+
+    @Override
+    public int fill(FluidStack resource, boolean doFill)
+    {
+        if (resource != null && resource.getFluid() != null && (!gas || gas && resource.getFluid().isGaseous()) && (!liquid || liquid && !resource.getFluid().isGaseous()))
+        {
+            if (fluidIds.contains(resource.fluidID))
+            {
+                return super.fill(resource, doFill);
+            }
+        }
+        return 0;
+    }
+
+}

src/dark/core/prefab/fluids/LiquidTank.java

@@ -0,0 +1,38 @@
+package dark.core.prefab.fluids;
+
+import net.minecraftforge.fluids.Fluid;
+import net.minecraftforge.fluids.FluidStack;
+import net.minecraftforge.fluids.FluidTank;
+
+/** Version of the fluid tank that only supports liquids
+ * 
+ * @author DarkGuardsman */
+public class LiquidTank extends FluidTank
+{
+
+    public LiquidTank(int capacity)
+    {
+        super(capacity);
+    }
+
+    public LiquidTank(FluidStack stack, int capacity)
+    {
+        super(stack, capacity);
+    }
+
+    public LiquidTank(Fluid fluid, int amount, int capacity)
+    {
+        super(fluid, amount, capacity);
+    }
+
+    @Override
+    public int fill(FluidStack resource, boolean doFill)
+    {
+        if (resource != null && resource.getFluid() != null && !resource.getFluid().isGaseous())
+        {
+            return super.fill(resource, doFill);
+        }
+        return 0;
+    }
+
+}