Wait, how does black hole boosting supposed to help, lol?
It increases relative time speed, which means for an outside observer, like my HQ, it actually slows the growth of biomass on a selected planet. For example: 1 hour on planet = 1000 hours on HQ. 1 kg of biomass per 1 hour on planet = 1 kg of biomass per 1000 hours on HQ. :D