I see a lot of comments on the forum about the price of heaters, what heater is the best, etc. I now buy my heaters at Ken's Fish. He has great prices and a good selection. I recently bought 5 150 watt heaters for about $13.00 each (including shipping). I can't complain about the heaters I received, they are well made, they are maintaining constant temps and best of all - they were cheap to buy. Here's the link.