How long can I blackout a sump with refugium (Chaeto) for ?

[Rohirrimus]

Hello ,
I had a bad outbreak of ciano and part of my treatment is sump blackout (since I had it worst in there).

It’s been dark for 3 days, but I think I might need a day or two more,
Can Chaeto survive that or I need to turn the light back on tonight ?
Thanks

 

[Rothric]

It will be fine. I was messing with my refugium light timer once and accidentally left the light off for several weeks. The chaeto definitely shrank and suffered, but once the light came back on it bounced back quickly.

 

[Rohirrimus]

It will be fine. I was messing with my refugium light timer once and accidentally left the light off for several weeks. The chaeto definitely shrank and suffered, but once the light came back on it bounced back quickly.

Thanks, I’ll keep it off a bit longer then. Thanks