Hello everyone, I have a really bad algae problem it's mostly on my sandbed. A lot of it is red in color almost look like slime. I immediately thought cyano and went and bought kemi clean I dosed it as instructed performed the water change and did another dose. Didn't even affect it a bit. Indicating to me that it's probably not cyano. What can I dose other than vibrant in the tank to get rid of this crud? Here's what I've done so far I dose microbactor 7, alongside with vibrant. My ammonia levels are at 0, nitrates are always at zero, and my nitrites are at zero. Before you say this tank is not properly cycled it's been established for 2 years. Also my levels got significantly lower after I change my filtration system. I also have zero phosphate.

