Hi,
My system is one month old & it's showing brown algae everywhere in 80g tank. I checked the water parameter this afternoon:
NH3 = 0
NO2 (Nitrite) = 0
NO3 (Nitrate)= 12.5
pH = 9.8
However, I have a skimmer & activate carbon (just replaced new one) in wet/dry, 50 hermit crabs & 20 snails...