It is true that, concerning brown algae (diatoms), a lot of even valuable sources claim that they thrive in low-light conditions, and therefore they recommend to increase the lighting period to get rid of them. This confused me a lot at the time, but in the case of my tank, half of it heavily covered with fake roots, it was clear where truth was: in the open space, directly under the lights, I had diatoms all over the sand, whereas in the shadow parts the sand was clear.
This said, after 6 months, I still have diatoms (photoperiod 8 h, 2x39 W T5, SG 1.002, 8 Zebra Nerites doing a great work, only a cuple of stems of hornwort, struggling against a systematic attack of whatever algae is colonizing it).
This said, after 6 months, I still have diatoms (photoperiod 8 h, 2x39 W T5, SG 1.002, 8 Zebra Nerites doing a great work, only a cuple of stems of hornwort, struggling against a systematic attack of whatever algae is colonizing it).
