I just ordered 4 new bulbs for my 4X65W PC
light. I had not changed the bulbs in 10-12 months and all I can say is WOW!!! I had started to see some hair algae growth as well as some other algae and figured it was probably from the lights since I have not had this problem until recently and all my parameters are in check. The new lights look amazing compared to those old bulbs. The thing I notice the most is the blue of the actinic really shines brighter giving that nice purple glow in the tank. I just wanted to share because I was so amazed at the difference I saw after changing them!!
I also have a question. How long do you expect it would take for this algae to die off now that I've changed the bulbs? I use RO
water and my nitrates are >5ppm so I am assuming it was the bulbs that caused the growth. Just hoping it goes away soon!
Thanks for listening.