Planted Tank Enthusiast
Join Date: Sep 2011
Location: Mississauga, Ontario, Canada
Breeding high grades with each other will should yield high grades most of the time. But, there might be a possibility of a lower grade AKA SS or S appearing.
Just make a cull tank and sell off the ones you don't want, but getting lower grades shouldn't be common since you have 100% of SSS for both CBS and CRS