Hey guys, So as we are all aware in the UK, summer is here and temperatures are rising. Now keeping your tanks at the correct temperature is easier in the winter with the use of a heater. But in the summer there is not really much to cool your tanks down. So here are a few tips to keep the temp down. 1.) Reduce your lights on time. I don't know about you but my lights give off heat and with a lid on it can build up and start to warm my tank. By reducing the amount of time you have your lights on, reduces the time that the heat is being given off. 2.) If you have a lid on your aquarium then it can restrict the heat transfer. So by having good surface agitation, and leaving your lid open this will allow more heat to be expelled, and for the cooler temperature to be absorbed. I have found by lifting my lid it is able to drop the temperature a lot, but make sure your tank does not get too cold. 3.) Ice cubes. This is not always the best option and you need to do some preparation. Get some tank water and make ice cubes out of it, DO NOT use tap water as you will be releasing chlorine and heavy metals into the water column. This does work but is not really that affective for larger tanks, also you are adding water to your tank. 4.) Cooling fans. So just like opening the lid, it is important to maximise your repeater exchange. You can find on Amazon a few good cooling fans that will force cooler air across your tank water surface, helping to blow away the hot air coming off and blowing cooler air to be absorbed. 5.)Cooling systems. Now these are harder to find. But you can get filter looking systems that will cool your tank water down. It works kind of like a fridge, takes water in and runs it past cooling pipes or panels in the device, then sends it back into your tank. You can make these for rather cheap, but you will need to know a bit about electrical engineering. Hope this helps you guys out, if anyone has more good tips then please let me know so I can add them.