moving fish

[Kathyrae]

I have a large Koi pond. When I was emptying it last summer, I found some babies. I set up a 10gal tank to raise them as they were the size of my pinky nail. They are bigger now so I bought a 36 gal acquarium and also bought 4 small HighFins to raise bigger for the pond.

My water got bad (high nitrate) and I lost 2 of the highfins. I have set up the 36 gal tank now. Put 2/3 healthy pond water, tap water and some from the 10 gal tank...it has been running for 10 days now. I have been regulaly adding bacteria, amazon rain, declor etc.

I have done partial water changes in the 10 gal tank over the last week, added bacteria, amazon rain, declor etc. The water is getting better but I want to move the fish into the new tank now.

Is it safe to do that yet? Can I take fish out of a toxic tank and put them in another tank? I need help.....anybody know how to help me not loose any more fish.

Many years ago I had a 100 gal fresh water tank and can't remember much.

Thanks in advance and look forward to getting to know you all.
Kathy