Hi, I'm posting to warn all you people: don't buy the Tetra 200 W heater! So I got this heater with a 29- gallon starter kit. The first few months it worked just fine, kepping the temp. constant at 27 degrees celsius ( 80 fahrenheit i think). By the time summer rolled around, the temp. rocketed to 31 degrees celsius. At first i thought it was the weather, but it wasn't! So one day, the temperature went up to 35 celsius!!!!! (94 f) Right now the heater is at the lowest setting at 29 celsius, which is fine for my platies. I'm afraid the baby fish in the tank didn't survive, though...:wall: Anyways, DO NOT BUY THIS PRODUCT!!!!! Learn the easy way and not the way i did!!!!!!