Water change

[Keilus]

I have a 210 gallon tank i just upgraded to that was fully setup when ingot it. So no need for a full cycle. The problem im having is during shipment a corner was chipped creating a leak. I moved all fish and live rock into a 90 gallon extra tank i had on hand. But the rest of the water was put in a 300 gallon tub and left outside for a week. The question is how bad will it hurt to replace about 75 gallons with new saltwater basically doing a 25+% water change? Or should i just let it run thru the sump for a few days to clear our the west texas dirt

 

[Shibaken3]

there are probably a lot of free particles not good for the fish. I would just dump it.