Hi bro,
I thought this chiller can only set 1 degree different so how can you set it to 26.5?
Btw, I have tested and confirmed that this chiller is more suitable for <45Ltank if wanted to cool down 26 or low. Maybe 280W version can do the job better.... !
For my tank, I have almost the same spec as your but I set it to 27 instead as I only plan for LPS and blennies/gobies nia.