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Hi,

So, I know very little about planted tanks. The most I've done successfully is toss in a few aponogetton and lily bulbs that eventually grew.

What I wanted to ask today is I'm wondering if there is some kind of vegetable I can get at a grocery store that can be used to lower nitrates and live either in a hang-on filter and maybe stick out a little, or live entirely submerged in water within the aquarium?

Any ideas? I've also tried watercress (from seeds) with no success what so ever.

Thanks.
Interesting topic and I'm hoping some more people get involved in this.

I don't know that I've heard of anyone using vegetables either way. If I can just use supermarkets I think I recall people growing herbs in planted HOBs, don't remember what kind though. That was in addition to the usual suspects like wandering jew.

I know of two herbs you might be able to find at some Asian markets that I've seen people keeping submerged. Persicaria odorata (Vietnamese coriander) and there is also apparently a form of Limnophila aromatica with 3 leaves at each node instead of the usual 2 being sold in those places.
 

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Those no Asian markets around here either, but if I wanted an aquarium plant it is an easy thing to find online.

Aquatic onions are Crinum thaianum. Totally different thing as far as I know.

Is the goal just to get some cool plants? Or are you trying to lower nitrates?
 

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Floaters would be your friend then. They are nitrate hogs and most are incredibly easy. Light is seldom an issue for them since they are so close to it.

Are you having a nitrate problem in between water changes?
 
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