Instant Ocean Reef Crystals crashed my Tank!

[Tiansho]

I am using RODI water and have been since I started my tank. I ran out of my salinity salt. I tried using reef crystals, and mixed my salt with RODI water, left mixing for two days. Reached salinity level 1.025 (same as my tank) and same temperature. Tank was doing really well prior to water change. And after...... the tank crashed. I got some salinity salt fron my brother in law and within a few hrs i saved what corals i could.