Can I use River Rocks in my Home Built Hydroponic System?

This Hydroponics Hobbyist wants to know if he can use river rocks in his hydroponic system. Below is where I answer his question along with my opinions about other hydroponic media.

Build your own Ebb and Flow / Flood and Drain Hydroponics System DIY Animated Version

http://HydroponicsFriend.com

I hope this video will show how and encourage people to build their own Ebb and Flow Hydroponics System. This is a fun hobby for me and I believe other people would enjoy it too if they knew how easy and relatively inexpensive it can be.

Why an Animated Version? It allows me to show the inner workings of how this Ebb and Flow system works. I suspect this is something a person who has never seen one in action would want to see. It will also take some of the mystery out of it. This shows how simple a Hydroponics system can be. It also allows me to show variations without having to build several systems. And finally, I wanted to do an animated video and try out the Narration feature of Windows Movie Maker. LOL
May more videos on You Tube.

Home Made Ebb and Flow or Flood and Drain system. DIY Hydroponics

http://HydroponicsFriend.com

This is my first attempt at building my own Hydroponics growing system. So far it works great! I chose the Ebb and Flow because It appeared to be one of the simplest to build. This is constructed mostly of things I had around the house.
A used laundry detergent bucket, well washed of course.
A Ziploc disposable food container.
Aquarium air pump.
Tabletop fountain water pump.
I had to purchase one foot of tubing,
Hydroton pellets,
and Net Pots from a Hydroponics store.
It was actually fairly easy to build but if you wish for me to explain exactly how I built it, just ask in my comments section.
Check my Youtube Channel for even more videos.