Algae ID

[marie]

2 powerheads one in each corner of the tank pointing towards the center front would create a good flow.
Do another large water change, siphoning out as much of the cyano as you can, add a second powerhead and maybe put some carbon in your filter. Check your alk, some people have had good results keeping a higher alkalinity (around 11 or 12 dkh) and the cyano will go away (maybe not by weekend but it will go) .

If you are impatient then go the chemical route but that only gets rid of cyano tempararily, it doesn't fix underlying problems and doesn't guarantee cyano won't come back