My 90 gallon tank just finished cycling. It has an over sized skimmer. Plenty of flow and light for anything and a 20 gallon fuge. My temp is at 80. My water shows 0 nitrite and 0 ammonia with nitrates around 20 ppm. I did a 20 gallon water change with 0 change in nitrates. I used all ro/di water. So my questions are can I add a fish a little cuc and a soft coral or 2? My cuc would be probably hermits and snails for now my fish either a 6 line wrasse or fire fish. For nitrates should I do a bigger watter change? Also my ammonia has been at 0 now for 2 days. Would the ammonia bacteria start dying already?

