i've had my aquarium set up for 1 year + , i've had the same bulbs in MH
bulbs in place. i know i should switch them out in a year but they still look great. can anyone tell me the reason for switching out bulbs and what will happen if i don't.
second part. the cheapest i could find a 400w 20 k
bulb was from our pal darin at captive reefs for $63 anyone find them cheaper?
thanks for everything