Red filter on my underwater camera

[SpikeK6]

Hi guys

I am probably going to answer my own question here but here goes.......

I have just received my new camera to use when I go diving, it came with a red filter that screws to the front of the housing, Now i am guessing I will only need to use this at say 25m+ as thats when you start to loose the reds as that is the first colour to be lost underwater.
So for general photography underwater at less than that depth It would not be needed.

I think what I have asked is right but just wanted some clarification

Thanks

spike