the amount of money you are spending on those rays and bringing them into a tank thats probably not going to be stable is risky.i have had bad experiences with bio boosters.you will test your water everything will seem fine for a few days maybe weeks,your gaurd may slip and your tank may start spiking again.unless you use a very mature filter on that tank i would say hold out bringing them in.just to be safe ,not saying it cant be done ,just saying i have killed rays like this before in my early days of ray keeping