cooling

We're having something of a heatwave here in London and very few houses in the UK have aircon (mind does not!). I have fans running in my three "fish rooms" but the room temp is still sitting at 27c in the rooms with tetras, gouramis, bettas and my ranchu goldfish, with tank temps also sitting...

Hi, I've had a tank for a few months now. It's 80L and I have an angelfish and a sucker. I had a dwarf gourami but recently my air con broke and it got too hot for the poor thing. It's been up to 30C in the tank some days, maybe even higher! My angelfish and sucker fish seem totally fine, but...