Hiya
I run two fluval external cannister filters on my tank.
Filter one was due to be cleaned in the next few days.
Filter two was off for 8-9 hours last night after lightning caused a brief blackout - it is plugged into an RCD plug and I had to reset it this morning when I realised what had happened. Filter one stayed operating as it is plugged in to a different plug
Will this have killed the good bacteria? I am wondering if I should put off cleaning the other one for a while. And if I should wait, how long for?
Cheers
Jude