It does look like Blue Green Algae as it is a sheet with air bubbles under it. It is a bit darker then what I see in photos / youtube etc.
I'll try the advice posted... Does LED lighting need to be replaced? I have good LED lighting that is built for planted fresh water tanks... Wondering...
I have a 60 gallon bow front that has been up for 3 years. It was set up with plant media that is deep 12" towards the back and slopes to the front. It is running with an EHEIM Professional 3 rated for 100 gallons. It is running with biological filter media.
The tank began to have a massive...