Bought a few 5 in. Koi yesterday for the pond. Outside Temp hit 28 degrees this morning. Should I just keep them in one of the inside aquariums til Spring now? Haven't checked the pond temp yet, right now just have alot of different size comets in it. Bought the Koi at Wal-Mart, felt sorry for them, they were gasping.Checked the water they came home in and the ammonia was dark yellow! Thinking about going back and getting the last two that were left in that tank.