sandstorm1221
New member
How often do I replace my bulbs. I have recently been battling cyano like crazy. I've tested my water many times and phosphates and nitrates all turn out 0 mg/L. That was AP test kits and I want to get salfert to see how close they were. If it turns out to be correct, im suspecting my bulbs but Ive only had them for about 5 months. Could they be going bad already?