Tetra Correct pH Tablets 8 Count, For aquarium Water

Is it safe for invertebrates? Is there any cooper in the formula?

How exactly does this work how will a tablet flip the ph up or down? Or is there tablets for ph up and ph down in this box? Nothing else does both

Maybe a dumb question, but if i drop 1 tablet into a 10 gallon tank, is it just going to automatically get the ph to 7ish? cuz my ph is currently low.

Do you need to remove the filter while applying the tablets?