Hello Im new, this is my tank 1 month

[Bodhi]

Im starting to have a bit of a cynobacteria outbreak and Im looking for any input/help. I took the rock peices out and in my salt mix/water change tank I scrubed it off with a tooth brush, I tried to suck as much off of the sand as possible, and Im reducing the lights to 9hrs a day. Im not sure what my phosphates are cause I cant afford the test kit untill wednsday.All food is being consumed and amm,trite,trate,s/g,temp all good? Any ideas?