Algae does come and go in natural cycles.my 55 gallon had really bad algae but it went away for some reason
Lots of molds and bacteria and fungi probably growing on it.Huh. It decomposed or something?
You also need to cut back on lighting period to no more than 2 hours a day.I mean the white blobby thing in the back. Is it more cyano? I’m dosing monthly with rid-x to control bba and CITA Cyanobacteria