Some of you may know about this heater brand already, but they are still pretty hard to find here in the US. They are made by Sera, are totally submersible and come with a heater guard to fit the filter.
I bought the 300 watt to put in my ray's tank three months ago from a fish store about an hour from my house; I love it! The store clearanced them out so I bought two, but had been unable to find them since, until now!
After a lot of searching I was able to find them a few places online, so I'm passing on a link to the store that I found to have the best price:
http://www.thehiddenreef.com/istar.asp?a=3&dept=TEMP&manufacturer=SERA&sortby=&numperpage=16

I bought the 300 watt to put in my ray's tank three months ago from a fish store about an hour from my house; I love it! The store clearanced them out so I bought two, but had been unable to find them since, until now!
After a lot of searching I was able to find them a few places online, so I'm passing on a link to the store that I found to have the best price:
http://www.thehiddenreef.com/istar.asp?a=3&dept=TEMP&manufacturer=SERA&sortby=&numperpage=16