no, doing it that way wouldn't really get you a bog filter. You have to force the water down to the bottom of a container and then it rises up through the gravel, giving the bacteria a chance to break down the ammonia and letting the plants take up the resultant nitrates (upon which your algae feeds, thus out competing it!). Gravel on the side with water all around isn't the same thing, though you will improve the bacterial surface area for colonization.So I could just plant the plants in gravel in the planting shelf no extra earth needed as there is a bed of soul there, when I plant the new plants soul comes out and makes the water worse! ? Thank you
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