Failing hard with class instansing. (solved)

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class jWater : MonoBehaviour {
5.  
6.     public class waterPixel {
7.         public float amount;
8.         public float[] flow;
9.  
10.         public waterPixel() {
11.             flow = new float[9];
12.             amount = 0;
13.         }
14.     }
15.        
16.     public static waterPixel[,] waterWorld = new waterPixel[WorldData.world_size, WorldData.world_size];
17.  
18.     public static void init_water() {
19.         //de nada
20.         for (int i = 0; i < WorldData.world_size; i++) {
21.             for (int j = 0; j < WorldData.world_size; j++) {
22.                 waterWorld [i, j].amount = 0f;
23.             }
24.         }
25.     }
26. }

So, i was hoping to set up a worldmap structure in similar way i used to do it back in C days but with classes. Obviously something is not right here, as i am getting "NullReferenceException: Object reference not set to an instance of an object"... but i thought that the new WaterPixel part there is supposed to create the new instance? Whats going on?

 

The array is created but each value inside the array is still null.

Code (csharp):

1.  
2. waterWorld[i,j] = new waterPixel();
3. waterWorld[i,j].amount = 0f;
4.  

 

I knew it had to be something simple. Thanks. Though i still wonder if this is the right way to go about this. In general i mean. Having entire worldmap data stored in a such way.