Hi there :wave:
I just got a new ATI Sunpower pendant, 4 x 39W, for my 90x45x45 tank. I is going to be an iwagumi tank, probably just with HC growing around stones. I have pressurized Co2 system as well, diffused via UP Aqua inline diffuser.
Now, do you think that 2 bulbs for 8 - 10 hours...