My split system heat pump decided to start leaking, but I didn't know it was leaking until my floor started to sag a bit. I've cut into the linoleum and the subfloor is wet. The vinyl plank flooring in the dining room (which is right on the other side of where my hvac is, was pulled back today and it has mold growing underneath it. I'm thinking that it's an area of 5'x5' at the most that will need to be replaced. We're going to replace the subfloor, but what can I do (in the meantime) to try to kill some of this mold?