start with just three things. I trust this thing TESTS before adding. If your alk drops below 7.9, bring it back. Ideal alkalinity on the DKH scale, 7.9 to 8.3. Never let it leave that bracket.
Keep your salinity at 1.024 to 1.026, never lower, never higher. Dose with fresh water to keep balance.
Keep your temperature at about 79, with as little variance as possible.