I have a couple of pairs of Koi Angels that have laid eggs 3 times and every time they have eaten the eggs. They are in a divided 55 gallon tank with 2 AC110s in it with sponge pre filters over the intake tubes. I have set up a spare 20 gallon tank I intend on hatching the eggs away from the parents next time they lay eggs. I have an AC70 hang on back filter on the 20 that I put a pre filter sponge on intake tube. Question I have is when I do take the eggs and put them in the 20 to hatch do I also take one of the pre filter sponges off one of the 110s in the 55 and put it in the 20? Or do I take the media along with the pre filter sponge out of one of the 110s and transfer that to the 20? I just want to make sure there will be some good bacteria transferred to the tank the eggs and hopefully the fry will be in.
