I was sitting here looking at my tank and noticed bubbles coming up from the sand. What could this be ?
There a small brown patch and has tiny bubbles on it. Sand is about 3 weeks old. Could this be my problem.
Any helpful advice is greatly appreciated.
I have a 120 48x24x24
Temp 78
Salinity 1.025
Phosphates 0
Alk 8.9
Calcium 420
Nitrates 2
All salifert tested
OR T247 x 2 - 8hrs (blues only)
T5 retro 48" x 2 4hrs