Starting a 20 gallon fo of fowlr tank and need help?

hello, i am wanting to start a 20 gallon fowlr tank and i need to know what do i need.but i do not want to put 20 pounds of rock i want to use 5-8.
i previously had a freshwater tank
i have now a 20 gallon filter
-100 watt heater
- airpump with airstones
- and gravel
so what do i need and what do i replace?

 

The airpump will be unnecessary.

I've never heard of people using gravel in saltwater tanks. Most people use pool filter sand or arragonite.

As for live rock, i promise you it will be a thousand times simpler if you just have the 20 pounds. 5-8 lbs will be essentially usless in a dencently stocked tank.

 

wellcome to fishlore.
It seems that you need more info.
I recommend one thread
https://www.fishlore.com/fishforum/...-starting-saltwater-tank-beginners-guide.html

That's very useful for me.
I am a beginner too.

 

I agree that is the best info you can have to start a saltwater tank. That thread has all the basic info and is very clear cut