Fishkeeping During A Heatwave

@Helen I know what you mean about the tomatoes. I used to work at a company that made ultrasonic level controls so I have been to more than a few water works and treatment plants. I think you are safe though, I was told that the plants never flower because they lack Potasium? (It was 30 years ago)
For the others, tomato seeds make it through the gut undamaged so the dry settling tanks have enormous tomato plants in them

 

On the news this morning they have mentioned that the peak times for water usage are 7-9am, and 5-8pm.
I would guess that most people have more than enough to do getting themselves & their families up and out of the house in the morning, so water usage for tanks is unlikely to be high at those times.
For those of us who work from home, or are generally at home during the day, may want to consider performing tank maintenance at the off-peak times. I'm trying to do this, though it does mean storing the waste water until late evening/early next morning to use on the garden.
Having a clean car has never been a top priority for me, ditto for windows, etc. and my laundry is piling up (great excuse to be a tad lazy on that front). I may have to give the suggested showering method a bash as well.
I feel obliged to be as frugal as possible with water because Cambridgeshire is a very agricultural area, with a huge amount of veg being grown, and obviously the water usage in this weather for growing crops is just as large, and essential. This area also gets relatively little rain, and I never considered that as a down side when moving here.
As this weather has been forecast to continue for quite some time, I'll be having a serious look at my tanks over the next day or two. I'll be looking at increasing the water testing regime whilst reducing the water change quantity (just to be on the safe side), and getting some more plants into some of the tanks (especially floating plants).
Some of my tanks are substantially under-stocked, so I'm hoping they will do well with reduced volume water changes, although I do have a slight problem with the axolotls - one of them has cut his leg. On the up side ( ) this means I'll be moving him to a quarantine tank, with the main tank working on reduced volume water changes. On the down side, this means almost completely emptying their large tank today so that I have a chance of catching him. I can use some of the tank water in the quarantine tank, and the rest on the garden, but I will have to use a few hundred litres of water today. Not ideal, but absolutely essential.

Fishtank isn't looking in great condition in this weather. Will be doing an extra water change tonight. After 8pm, so non peak time!

Were supposed to have some thunderstorms in the South this evening. Should hopefully cool things down a bit temporarily.

I have no idea what's going on with my tank! The tank is kind of tucked in a corner, so usually only gets winter sun, when it's low enough to reach right across the room.

Just in case, the curtains have been closwd all day but that doesn't seem to have made much difference.

I take that back. The scales aren’t the same, sorry !!!

Updated trace. I've made sure that the scales are all the same - 72 hrs. The ammonia spike is midday on monday. And it's clear where I did my cold water change. Think I might do the same again tonight. I only did 30l so it didn't take too long. I also unplugged my heater, just in case it was on the blink. I can at least rule it out. I've got a room thermometer that I think I'll put on top of the tank.

My tank is getting more smaller water changes with just cold tap water to manage the temperature. It has been creeping up, strangely overnight. I'd think my heater had gone mad if I'd not unplugged it. I've come to the conclusion that my lounge heats up during the day and because of the volume of water in the tank, it has a bit of a lag and therfore picks up the heat later. I guess, there's also not a lot of air movement in the lounge after we've gone to bed and closed everything up.

I am enjoying sitting in a cold draught. It is cloudy and there's a breeze so I have opened all the windows and the back door. My eye drops have to be kept below 25 deg C; the coolest place in our house is between the front door and the internal door so that's where I leave them, together with a thermometer. But even there reached 23 deg last evening. It was 22 deg when I got up but after 15 mins with the air blowing through has dropped it by 3 deg already.
Hopefully the cooler room temps will help with the fish tanks.