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I would always recommend a sponge.... But there are some very nice HOB filters. Sponges do take up valuable tank space, and they aren't exactly beautiful. You just can't beat the biological filtration they provide. And sponges are cheap. Cheap cheap. Less than 20 bucks (including shipping) for a...

I'd be afraid he would eat/kill everything. Brown knives are very aggressive, but not all fish are the same. I've seen them get along with other fish.... but I have seen them kill everything that moves. As soon as the lights go out it could be a free for all. According to monsterfishkeepers...

I think I may have been misunderstood. My intent was not to "bash" any particular type. And by canister filters I'm not talking about "hang on back" filters, I'm talking about the big bad boys. They do need replacement media besides just floss. HOB filters are ok, and mainstream, but I feel...

Well, I personally haven't had any real problems with the simpler systems. I have undergravel systems that have been up and going for years with no problems, I know most people hate them, but I find them to be cheap, fry safe, indestructible. I find them completly adequate with very little...