With temperatures on the rise, now is a good time to check those chillers and find new ways to keep your aquarium running at optimal temperatures. Clean out the lines of the chiller to make sure water can flow through it unhindered, and recharge the coolant so that the unit can run efficiently. Replace any worn parts, and remove dust and other particles that can clog fans. If you’ve done all of that and your chiller is still having a hard time bringing down the water temperature, try altering your lighting scheme or add fans to induce evaporative cooling. LED lighting is a good choice, as it emits very little heat. If you don’t want to purchase any new gear, simply cut back on the amount of time your lights are on or raise the lights higher up off the surface.