The output stage of my circuit is a 2nd order inverting low pass filter. The input should be negative (DC), thus yielding a positive output (DC). It is possible that the input could be positive, but I don't want a negative output, so I grounded the negative pin of the op amp in the filter. It's not rail to rail but I should never be close the the bottom rail anyway.
My only real question was, am I supposed to still put bypass caps on the negative supply pin, which is grounded? That seems odd, because it would just be a cap from ground to ground, and seems useless, but I could be wrong.
Here's a picture showing part of my schematic:
The bypass caps network is not shown, but present, with 4.7uF and .1uF caps to ground.