230lbs of rock seems like alot for a 140. But anyways. If the rock is already cycled, you can add it to your tank without causing too much stress. If it isn't, I highly reccomend cycling it in a seprate container. In terms of stress to the inhabitants, it shouldn't be too bad as long as there is no cycle in the tank...
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75 gallon with 20 gallon sump in the works.
R. Bacchiega. Tattooer
I didn't smack you, I simply High Fived your face.
I've got so much glue on my pants it looks like a Friday night gone horribly wrong.
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