I'm a fan of the Eco, but I've only used Eco and Aquasoil, but of the two I much prefer Eco (do a search for eco vs aquasoil, latest thread more details). basically much more user-friendly I think than AS
For the filter, I use a Fluval, works good for me. The point on the cannister filter, that I have learned, is but MORE than what you need. B/c the cannisters "say" they are rated for 300gph, that's w/o dirty media, head, and a tank full of plants obstructing flow. And if you want to add in-line equipment, then you'll need more flow.
I'm actually putting a pump inline now to power the Mazzei venturi, UV and (coming soon) inline Hydor heater, since the cannister can't keep up w/ all that and the planted tank so well.
I'm getting to think that sump's may be more "flexible" options for manipulating equipment etc, not sure. If you are going to go cannister, get more than you think you'll need is my advice, you can always trim the flow back, but you can't get more flow if you need it.
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