This is my first project so no criticism please, Thankyou

Open GTA San Andreas, then open models and move the particle.txd to your desktop 
or in a folder where you can find it just incase you want to restore the original 
water effect its like creating a backup. After you have done that move the new particle.txd 
to the models folder and load up GTA San Andrea and it should now be changed.

BBBBB  AAAAAA   RRRRRR RRRRRR EEEEEE CCCCCC AAAAAA
BB BB  AA  AA   RR  RR RR  RR EE  EE CC     AA  AA
BBBBBB AA  AA   RRRR   RRRR   EEEEEE CC     AA  AA
BB  BB AA  AAA  RR RR  RR RR  EE     CC     AA  AAA
BBBBBB AAAAA AA RR  RR RR  RR EEEEEE CCCCCC AAAAA AA