65 gal divided by 10 = 6.5 You have 10 fish so 10 divided by 6.5 = a BFC of 1.53. That's an excellent number Bulent but just under mine at 1.57 - as long as the number is over 1.00 you have a good fish poo supply for SPS habitation.
If you add the new fish you will jump to 1.69..............
