From what I'm reading : was this tank ever cycled ?
I would bring your 2 clowns back and have the fish shop hold them for you unless you have a friend with a established tank to hold during your cycling stage
you need to add a ammonia source a deli shrimp is a good ammonia source let it spike to 4 ppm
, and wait out your cycle , some get a fast cycle other get a slow cycle
since your starting with all base rock it may be a longer cycle
Cycle your salt tank - Aquarium Advice