Hi, I have to do a 25% water change and my pump is slow. I need to go down below the skimmer and it will probably take around 3 hours to get there. My water temp is now 83. It is safe for the koi to be in the lesser water for the time it takes to drain and refill? We have 2500gal. pond with an air pump and a water pump with a spill splash. How fast could I fill it once pumped out? I have to do this today so I can put in a second treatment for parasites.
Thank You
Thank You