Hi guys i have a problem with cyno on the sandbed so i did treat it with chemiclean last week after water changed it all gone but after only 1 day it grow back again on sand and also on glassess so what does make this cyno grow? My tank no3 5-10 po4 0.03 0.04 so how soon i can use chemiclean again should i use the red mechiclean for next treatment?? I did used the blue one couples time in the past
please help TIA
please help TIA