VAreef
Reefing newb
At this stage with no corals or fish nah. Later you could lose many hundreds of dollars worth of corals due to it. Use this cycle time to learn how your tanks chemistry works. It's pretty basic(haha basic get it) and you will learn TONS. I also used tap water when I first started but I did a 50% water changeout after I learned Tap water was bad before even checking alk.