New saltwater tank, stocking help?

[Lotl]

I'm thinking about getting a 90 gallon saltwater tank and I need some compatibility help.
So the fish I'm thinking about getting are:
Chain eel
Sailfin tang
2x Cardinalfish

For bottom feeders possible fighting conchs? How many do you think I should have if I do get them? Suggestions?
Would my tank have too much room, or too little?
Sorry for all the questions, any replies appreciated. Thanks!

 

[melosu58]

For the bottom feeders get a goby. a bullet or pink spotted goby as they will sift sand keeping it clean for you.

 

[Sniperhank]

A sailfin will get really large and a 90 won't be able to keep it happy for its whole life. I'd suggest a different tang that doesn't get as large.