All from EI dosing... took a few weeks to adjust the fertilising amounts to make sure there was no deficiency. All the grass plants at the front almost all got covered in BBA and kept turning transparent and I lost 75% of the leaves.
It has bounced back well now and no sign of any algae except a smidgen of GDA on glass and pennywort and the odd GSA on glass around where my reactor is ( mainly because I cant get glass scraper to it )