what is this? bacteria? algae?

[jeffmr4]

I've moved everything from about a month old tank to another and the lighting is different on the new tank. It is less I think. I'm seeing this stuff growing on the sand that has an opal or opal grey color to it. Is this some kind of bacteria? Thank you,

 

https://goo.gl/photos/XiA1XH1CCW3hTrfSA

[Elizabeth94]

Kind of looks like cyano in the first and second picture. How often do you siphon your sand?

[jeffmr4]

I siphoned it for the first time last week. I siphoned all the sand I could, then transferred it to the new tank. I wasn't able to siphon the sand behind the rocks in the former tank but it didn't seem that dirty. The two pictures on the left are in areas of low flow and lower light. I have a skimmer, filter pad, chemipure blue and I'm going to be starting an algae scrubber soon. The cyano I've seen was red or red / brown but I imagine there could be more.

[jeffmr4]

I think you are right.

[jeffmr4]

Its been developing. I don't think it is cyanobacteria. When I did my water change it didn't come off the sand very easily. Its not red and has whisp kinds of things. I don't know if it shows in the video but there are some bubble trapped by it. Any other ideas? The guy at the fish store said to wait for the algae scrubber to start working and it would disappear. It is multiplying rapidly.

[jamescstein]

Water parameters?

[jeffmr4]

I forgot to post this link,

 

https://goo.gl/photos/sxCGpHh8gHv1z8eh8

 

The last time I checked it was ph 7.8, temp 77, salinity 1.025, ammonia, nitrite 0, nitrate 5 or less, phosphate below .25 (my kit doesn't measure low numbers), calcium 440, kh 11, magnesium 1260.