Great looking tank =).. Look forward to picking up a piece of the acro in the future..
I was dealing with some stubborn cyano also on my old system and new. I think I may have nailed it down though. I started to not use straight tap water to rinse my socks sponges etc.. I would initially but then I will quickly soak the item in either dechlorinated tap (prime) or rodi before it goes back in the tank. That and I added a chloramine filter onto my rodi in conjunction with my standard carbon block . Even though I never got a chlorine residual on the test I was skeptical that the single spectrapure block was doing it over the long haul for chloramine. Mine can be total coincidence though but Thought I'd share what finally worked for me cause I seemed cursed for the last 2-3 years with cyano it wasn't overbearing but it never went away.