clowninround
Aquarium Advice FINatic
How often should the bulbs be changed? Live Aquaria says they should last 18 months...but does this mean ALL VHO bulbs. I ask because I have no phosphates 5 on nitrates (think I need to adjust my nitrate filter) good flow and yet i have algae. I have a patch of cyano and some hair algae. Is there any way to tell if the bulbs need changing before their time???