So, this isn't a planted tank with CO2 issues, correct? In that case, I'd move KH to 3-4 dKH, which can be done right away. IMO, your KH is too low and might result in uncomfortable acidic conditions developing too rapidly. If you have a planted tank with pressurized CO2, then a KH of about 2 dKH is reasonable and higher would work as well.
GH is a little different and, for the sake of the fish, I'd tend to focus upon TDS. TDS below 200-300 is ideal for community fish, 400-500 starts to pressure them and more can weaken them so that other things can take hold, such as disease. GH components can heavily affect TDS levels (a TDS meter on Amazon is around $15). I'd raise GH by 1 dGH daily until you reach your target. This will allow the fish enough time to adapt to the TDS changes. Generally, a 10% daily change in TDS is well tolerated by fish.