I’ve noticed in some of your pics that the microsorium is planted. I am assuming that you know your planted aquariums quite well, as you’ve mentioned some key products such as anything Seachem, lol, and the aquasoil. I too am planted tank obsessed and run Co2 and the whole nine yards, and have noticed though, that microsoreum does better without Co2, but everything else you have mentioned, especially the HM, thrives with Co2.
Also, in such a small tank, though 10gls is sorta not that small, DIY Co2 is sorta sketch. I run it, and i’ve been careful with the drop checkers and bubble counters, but remember that Co2 will lower your pH, and in a smaller tank, it has a bigger effect.
Just a cautionary note from another planted tank member.