Changing lights

[cam78]

When changing the bulbs do you have to replace both actinic and the sun bulb? I ordered both but just received the white bulb. I'm starting to grow red slime and algae because the bulbs have to be changed. Is this because of the white or blue bulb being old?

 

[cam78]

a quick answer would b great. Thanks

 

[wangotango]

It's possible that that's what is causing the algae, but also check your parameters.
Yes, replace both bulbs.
-Justin