Hello Frankbaracca,
Welcome aboard mate.
I found this link for you. I don't know if this is what you are looking for.
You can give it a try and see if it fits your taste.
http://www.subsim.com/radioroom/down...do=file&id=538
It reduces the size of plants underwater.
Here is another mod you might be interested in.
http://www.subsim.com/radioroom/down...o=file&id=1015
Tweety