Hi Cubano076,
WElcome to aquatic Quotient and this wonderful hobby, Forget the hangon filter, the Ehiem Ecco would be a more worthwhile investment in the long run. If you wish to go without Co2, you might want to read up on Ms Diana Walstad's book which is very comprehensive on this matter. One last thing, you might want to consider a taller tank, maybe 24". I find 12" tall tank have limitations as alot of plants grow beyond that. Have fun.![]()
Cheers.
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