You can engage iwarna services to do a full water change with nsw. Stop adding live stocks and let the tank go through a fully cycle. Marine tank takes time to reach maturity stage, normally about 1 year. You don't need any fancy stuff, just 10% weekly water change and a very slow stock up of corals and fishes. The idea is to give time for the "good bacteria" to grow to take care of the waste created from the live stocks.