Friends

I am located in Toronto and new to angel breeding.

I am thinking of buying a koi breeding pair from angel plus or buy around 6 large kois and wait for them to pair up.Which is a better plan ?

In addition to the folowing that I have( API, water test kits for PH,GH,KH,NO2,NO3), TDS meter, heater, sponge filter(cycled) , air pump...what else do i need for breeding project.

Any books to read on breeding ?

Thank you in advance

Jgd