looks like a bit of slime on the sand but its hard to tell from your pictures.
Rock looks okay I think.
Keep an eye on it it will get worse on the sand if it is slime and there will be less of it when the lights are off.
__________________
150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller
180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
|