That won't cycle your tank. Cycling requires ammonia from either live or chemical sources and a source of good bacteria. Just water from a pond is unlikey to get it going.

In the case you are in, green water is good. It will rapidly absorb the ammonia produced by your fish and it may keep it low enough to save their lives until the bed actually cycles. Do nothing to discourage the green water. Watch for fish at the surface and increase the air stones.