Join Date: Aug 2019
Location: Washington State
First one is blue green algae/cyanobacteria, likely caused by decaying organics/dirty substrate. You can try killing with excel/peroxide and removing as much as you can, and then do a pretty thorough gravel vac to get all waste out of the substrate. Maybe do a few additional water changes/gravel vacs to really clean up the substrate.
Second one looks like some kind of hair algae, maybe rhizoclonium. Could be cause by a combination of too much light and excess organics. Try and remove as much as you can, spot treat with peroxide/excel, maybe do a blackout for a few days.