So there is no way to flush it out of the dexcool?
Either use the kit Valiant67 mentioned or use what I call the poor man's flush:
Drain whatever coolant is in the system, refill with water, run engine until it's up to operating temperature, drain (repeat until what is drained is clear). After final drain refill with the proper 50/50 antifreeze mix (meets Chrysler MS-9769 - HOAT). Recommended to use distilled water.
But BEFORE flushing you should identify the leak since you appear to be losing coolant. Could be a loose clamp, cut hose, or possibly the water pump is weeping and needs to be replaced.
As to compatible coolant, it must meet Chrysler MS-9769 standards. Mixing different types of coolant is not recommended. I would go by the manufacturer's recommendations before I would go by any coolant label (unless the label indicates it meets MS-9769).