For simple Water Scenery/Effects I have always used "Flight Water Pro", since FS 2000...
It doesn't affect frame rates in any way, is simple and effective...
...trust me...
(Many others are over-the-top, and unrealistic)...!
For FS 2000/ FS 2002/ FS 2004....>>>
Flight Water Pro by Daniel Ponce...8.4 Mb
http://www.simviation.com/fs2002scenery3.htmFor the sky, I am perfectly happy modifying the FS 2004 Default "Weather" Scenery...

...!
...a good excercise in learning all about different Weather systems...

...!
Paul...Dipping his toes in, and watching the clouds... 8-)...!
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.