My nitrates are now 15 ppm and phosphates at 0.19 ppm. But cyano is spreading on more sand and rocks.
I'm sucking them out, but hard to reach some rocks and sand in the back.
I'm trying something new. I'm injecting bacteria into the sand bed with a turkey baster (where the red cyano is on my sand). Let's see what happens. Basically, I have 2 sections of sand that is covered with cyano, I vacuumed a lot of it out from both section. Then I injected the bacteria into 1 section, and left the other section alone.