I say it depends on what Environmental Preset you are running.
I've heard that some of the insect presets target gut microbes, so if any of those are similar between the insects and tarantulas, then there may be problems. Obviously, I don't KNOW here, just proposing possible problem areas that I can see.
I would not run any of the sweeps, except for mold or slime molds, as even if these are present in the tarantulas, they are probably undesirable.
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