Thinking of starting up a 5 Gallon nano reef

Hello all,

I've been thinking for a while now of starting up a 5 gallon nano reef. I was thinking of purchasing the fluval spec v as my aquarium. I have owned a saltwater tank about 3 years ago which was a Fish Only tank. My thoughts on equipment for the tank would be :



Fluval Spec V

Build My Led 14000k 12" or 18" high output light

50watt heater

Some sort of circulation pump (probably koralia)

Live sand

(Pretty much all the basics)



I was thinking of keeping:

2 snails

2 hermit crabs

Clown goby (not sure black, green or yellow)

Mushrooms

Green star polyps

Frogspawn (I've heard it's hardy but also heard it's not)



I have some questions though..

What salt would be the best salt for me to use?



How hard is it to keep my water parameters good?



What are some easy corals I could start with?



Thanks for anyone who replies!