Adding another tank to the system????

[RetroReefs13]

So I?m planning on adding a 40 breeder frag tank to my current 100 gallon all sps system. I have a couple questions maybe the pros can weigh in on.

1- what should I be prepared for? Diatoms?
2- Will I be adjusting my 2 part due to more water volume although the coral load will still remain the same for a while?
3- any advice helps I just want to be prepared

My salt matches my parameters pretty close
I won?t be adding lights to the frag tank for a little while.

Thanks in advance

 

[reefiness]

I did this a while back. I dont remember much needing to be changed. Didnt get any diatoms, didnt need to changing dosing much. Im assuming youre going to use a common sump, the most important thing imo is to make sure you sump can handle the extra water during a black out.

 

[RetroReefs13]

I should be good in the sump and I use check valves for the returns. The water level is adjustable on the trigger39 just Incase I need a little more room for drainage
Thanks for the reminder