Hi. I've got myself a 300 litre marine tank with a birdnose, tomato clown, some glassfish and wrasse. Problem is, the heat in summer is raising the tank temperature to over 30 degrees sometimes ( have a lost a few fish ). The tank is kept inside out of any direct sunlight (only incidental non-direct sunlight gets to it). Frozen water bottles and fans blowing over the top do help a little, but the fan evaporates the water too quickly and I can't always be there to replace the water bottle, so have been considering chillers. I have been told Teco unit's are right up there but are pricey. Aqua one's seem more reasonably priced. I'll be upgrading the tank *sometime in the future* to a larger 880 litre, so a unit that could be used for that also would be great. I've read some units also have UV lights and heaters inbuilt. That'd be nice but not required. Any thoughts/recommendations? If it costs alot but is worth it I'd still consider it.