Alright everyone. I am thinking about getting into saltwater.. 
I have done some research, and to my surprise, it seems really easy: too easy. I have been keeping freshwater for 12+ years. Everything from Piranha to Guppies, to gobies, to chiclids. I've pretty much exhausted all of the tropical fish I have ever had interest in. Although I have always been inspired by the beauty of saltwater.
So lets see if I am missing anything!
1) I am looking to do a fish only tank. I think for now, until I get experience, this is the best option. I was looking to do a 29 gallon. I purchased a C-360 Marineland Filter that is rated at 100 gallons. I figure that should be more than adequate filtration. I understand lighting is important for reef tanks, but for fish, I heard that it is not as important. Regardless, I am planning on getting a T5 light strip.
2) I am not too sure what the deal is with sand. Everywhere I looked, it didn't seem to say whether it was needed or not. Hopefully I can get some insight on that.
3) I am familiar with testing PH levels, etc. I think that is pretty basic. Anything differ with salt water?
4) Lastly, would I be alright with two clownfish. I have always admired their beauty and would love to have a few of them in my tank. Would more be possible? Also, do they need a reef to survive?
Thanks for all your help everyone! I truly appreciate it!

I have done some research, and to my surprise, it seems really easy: too easy. I have been keeping freshwater for 12+ years. Everything from Piranha to Guppies, to gobies, to chiclids. I've pretty much exhausted all of the tropical fish I have ever had interest in. Although I have always been inspired by the beauty of saltwater.
So lets see if I am missing anything!
1) I am looking to do a fish only tank. I think for now, until I get experience, this is the best option. I was looking to do a 29 gallon. I purchased a C-360 Marineland Filter that is rated at 100 gallons. I figure that should be more than adequate filtration. I understand lighting is important for reef tanks, but for fish, I heard that it is not as important. Regardless, I am planning on getting a T5 light strip.
2) I am not too sure what the deal is with sand. Everywhere I looked, it didn't seem to say whether it was needed or not. Hopefully I can get some insight on that.
3) I am familiar with testing PH levels, etc. I think that is pretty basic. Anything differ with salt water?
4) Lastly, would I be alright with two clownfish. I have always admired their beauty and would love to have a few of them in my tank. Would more be possible? Also, do they need a reef to survive?
Thanks for all your help everyone! I truly appreciate it!