I've now labeled my tubesthats a bone head move i would have done! though i dont dose i use to just take things a little too fast if you know what i mean. it was time for a water and well when i was done testing my water bucket of fresh mix , i got distracted came back to do the water change and i put ro water in the tank not my salt water. after about 2-3 gallons i caught on what i have done and quickly corrected the issue. could have been a lot worse but it was actually during my first month in the hobby when it happened.
im glad things are getting betterfor you