Can anyone help identify if this is cynobacteria or Dinoflagellates, and how do I get rid? I think it maybe dinos from what I’ve read. I don’t have a UV steriliser and would like to hold of getting one at the moment. Is there any treatments anyone would recommend.
The colour on the photos is a little deceiving. It’s more brown than purple/red. The rocks look like that after I have used a turkey baster to blow off as much as I can.
Any help would be appreciated.

The colour on the photos is a little deceiving. It’s more brown than purple/red. The rocks look like that after I have used a turkey baster to blow off as much as I can.
Any help would be appreciated.
