Illuminus green patches on my sand?


New member
Can anyone tell me why i have illuminus green patches in my sand please. Is this normal or should i be concerned??



New member
How much flow do you have in your tank. I
t also sounds like cyano or algae due to the build up of nitrates and phosphates on the surface of the substrate


Space cadet
Premium Member
definitely could be algae. What are your water parameters? Nitrates, phosphates?