Blackout Gone Bad

[Musho3210]

Well on the second day of my blackout i bought some filter media so i decided to add that in. Upon opening my canister filter i saw 2 fish carcasses, immediatly i took off the blankets from my tank. The tank seemed perfectly fine (algae problem wasnt fixed though) and the fish seemed annoyed at me for waking them up. I looked at the filter intake and found out that the strainer grid had fallen off so my filter wasnt straining the water. This leads me to believe that the fish were sucked in, no dead fish in the tank though.

I lost 2 corydoras and 1 baby cherry barb that i have had since it was an egg. The baby cherry barb may have been eaten by my newly added kribensis though since ive noticed my kribensis mouth is big enough to eat one.

 

[-germ-]

I noticed something similar the other day;
Due to my GF giving birth, i didn't want to go out and not get back leaving the lights on for too long so all lights were left off for 3 days.
When we finally returned for good i turned on the lights in one of my Betta tanks and my male Betta and 2 WCMM (kept as a 2 for good reason) had lost their colour, the WCMM were shimmying on the bottom of the tank and the Betta literally lying there looking half dead. I added some SeaChem Prime on the off chance there had been a spike and some foos to try and get them going and within half an hour they were swimming around like nothing had happened.
I have minor plantation in this tank so doubt it was a increase in CO2.
No other symptoms.
My thoughts, although i never bothered to research it, were that NOB/AOB may need light to thrive so a toxic spike had taken place?

Anyway just my recent experience.....

 

[Musho3210]

hmm i dunno, after seeing all my other fish perfectly normal and healthy, i doubt it was a disease or toxication or anything like that.