Interruption of power supply

I have just been informed of an interruption of power supply this Friday between 9.30am and 4.00pm
When we had a power cut about 2 weeks ago it was an absolute nightmare having to boil pans of water to put into plastic bottles and put them into the tank to try and keep the temperature up.
Does anybody have any better ideas of what can be done to keep my fishies happy

heat pack maybe?

Do u know how long it will be off for? From 9.30 till 4pm or just a few hours inbetween?

It says
"It is difficult to be accurate about the duration of the interruption and the following times are only approximate"
So it could only be an hour or it could be 61/2 so I would like to be prepared for the worse case scenario

How many tanks and what type of fish?

I have a cold water tank 64ltrs with 2 Goldfish, 4 WCMM, and 1 plec
1 Tropical Tank 305ltr kept at 26 Deg with
Clown Loach
Guppies
Neon Tetras
Dwarf Gourami's
Bristlenose Plecs
Thanks for your replies
Mike

can u bag them up and put them in a poly box just in case?? not ideal but would keep them warm

They are all fairly resiliant fish. All I'd do is not feed them the day before and bump the tropical tank upto around 28 oC. Then on the morning just wrap the tank in a big double or kingsize duvet to keep in the warmth. Even if the power is out for a good few hours the filter media and bacteria should be fine and the water should be sufficiantly oxygenised. The temperature will drop but it won't do your fish no harm in my opinion. I've left heaters off for a couple of days with no ill effects.

That's great, I didn't think of wrapping it up lol
would you just put the temp up the day before or do it now so that they have time to acclimitise before the temp drops?
I dont want to stress the fish too much by fluctuating temperatures

I would just wrap it up or use polystyrene or newspapers the only thing to worry about is You and the stress!
The fish will be ok with a slow drop in temperature, and a slow build up when the power comes back on. Just check your filter starts up again after the power has been off. Relax mate they are tougher than you think.

I think a tank your size would take alot of hours to drop plus room temp isnt much different to 26 degrees. I wouldn't worry too much mate.

hes going to use my generator that will sort it out

Now I can chill out lol

rest your head my friend lol u might sleep tonight .

fish are a lot more resilient than people think. ive got some small discus in quaranteen now that had a 36 hour trip from malaysia to here only last week!!! and heres what they look like now so dont worry too much!!!

Nice discus beautiful

cheers mate, just got a lot of water changes and plying them with food over next few months to get them to grow. even at this size though, they are showing good shape and colour.

look nice them kev

They didn't turn it off in the end apparently they found asbestos in the hole that they were digging, I think it was Friday and they wanted a flyer