These are all over my tank in areas that are shaded from light. This pic is from the glass behind where the overflow sits. It's also took over an area of my sump that does not have light and the shaded areas on the LR.
Heads on my frogspawn are dying. The heads turn into a brown slime and die, the slime then spreads and kills neighboring heads.
I'm also battling a major outbreak of cyano. I have cheato in my sump that has become smothered with cyano. I removed all the cheato and bio balls since they too were collecting cyano, from my sump.
Tank is 4 months old.
Specific Gravity = 1.025
Phosphate = 0.25 mg/L
Calcium = < 300 (I am now using Seachem Reef Complete to raise this)
Nitrates < 10
Used Hydrometer and Hager test kit.