What is it

[aerialdronemaster]

hello all
This one is new form me , it shows up on the glass like a foil fim ,
It's on the sand it basically covers the sand , and it is hard to remove, even by vacuuming the sand

Thank you

 

[AquaPhilNJ]

Looks like cyano. Yes, knowledge concerning Cyano is reef basics, but sometimes the simple answer is the right one. Be mindful if your aquarium does or does not have a good bacterial balance; this is something often seen in many new aquariums. Brightwell Aquatics MB7 can help create that bacterial balance and remove that new tank syndrome.