Should I supply my subjects GRE if optional

[KingGeedorah]

I'm not exactly real proud of my chemistry subjects GRE. To be fair I had health issues that lasted a year when I took it (never diagnosed but blood tests showed something was off and my doctor could never find what it was) and I wasn't able to study for it. I scored in the 33rd percentile (650 was my score). So should I submit my scores to schools that don't require but still recommend the subjects test? Is this score bad enough that I should be concerned about submitting it? My general GRE score was significantly better (156 verbal, 160 quantitative, 4.0 analytical writing) if that helps.

[bsharpe269]

I wouldn't submit it unless it is required.