02-13-2013, 09:19 AM
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For canister filters Eheim, Rena and Fluval are the top picks.
I dunno about a heater in the filter. I just don't like all my eggs in one basket. As a matter of fact, I have two submersible heaters in my 60g, each capable of sustaining the tank temperature by itself. This splits the load some and ensures that should one ever fail, the other is on-line and can handle it. Usually one or the other is dominant, however I have had occasions when the room temperature dropped and both kicked in to maintain tank temperature.
I'm using Aqueon heaters. I like them because rather than glass, they are plastic coated aluminum (nearly indestructible) and have the red light/green lite indicators so I can tell at a glance what they are doing.
From what I've seen of the Fluval FX5 demo's, it does look like a pretty awesome filter.