The temp is a little high, you want too keep it around 17-19c, so its not too bad. To drop the temps take the rez out of the room and keep it on the floor if its not already. Another cheep way too do it is with a couple of frozen water bottles, one in the rez as needed and one in the freezer ready to go, when needed. Another way since you probably have a water supply close, is too use a copper coil filled with cold tap water. The cold water from the tap goes down a hose in too your copper coil that's in your rez, cooling the water. Then the water goes back out the coil too the drain. How you turn the copper tubing into a coil is. If the tubing came as a large coil, you can wind it into a tighter coil by hand. This is done by holding one end and turning the coils into ever-smaller coils. It may be helpful to find a solid round object that you can wind the coil around. A soda can is handy, but other items such as a two-pound coffee can or the bucket from an ice cream maker can do just as well. Simply wrap the tubing around the container, laying each coil right next to the previous one. Leave about 18" to 24" on one end. The final diameter must be small enough so there is at least 2" between the interior sides of your rez and the coil. Bend the short end of the tube at the top of the coil 90 degrees out from the coil. Bend the longer end 90 degrees so that the length of the tube goes back up toward the top of the coil. Bend the top part of the long length out from the coil. Slide a clamp over each cut end of the hose.Slip one hose length over one end of the coil. Repeat with the other end. Tighten the clamps to hold the hose lengths firmly to the coil.That's it! Your immersion chiller is ready to use, and it should have cost you less than $25.