Salinity.

Hello guys. A week ago i removed the lid from my biocube in order to mount the new ai prime hd. I was testing my salt using a hydrometer that was off by 0.04. So my salinity was at 1.028 due to the evaporation that i never had when my lid was on. Now i have a refractometer and my salinity is at 1.026, I don’t have an auto top off and when i get home my salinity is at 1.027. What can i do to eliminate the stress that it can cause to the fish. Should i drop my salinity to 1.025 so it gets to 1.026 ? Thank you so much guys always so helpful