How to open the newly bought fish tank?

I don't know the special requirements for building seawater tanks. Suggest going to South America (Aquarium Forum) to ask. But it is difficult to know that nitrification should be established in seawater tanks. Add eggs in addition. Your current configuration is to raise fresh water.

Adding edible salt is not acceptable. You should use coarse salt or something. Be sure to clean it thoroughly and pay attention to the residue at the bottom.

The ultraviolet sterilization stick can't directly irradiate the fish and the tank, the fish will be injured and the tank will explode algae.

Auxiliary equipment also includes egg separation, oil film removal, hydrometer, drying barrel and salt mixing barrel.

Only aquatic plants and fish can be added for 7 days. After nothing, add coral and fish a month later. Please study more in South America.

It's right to start raising less. Pay attention to the size of the fish.