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Side roots on the stems: why?
Hello everyone,
One thing I don't like about keeping natural plants in my aquarium is that some species tend to grow side roots on their stems, usually at the base of the leaves (or is it where the stems branch?) For instance, plants like Cabomba (sp?), Hygrophila polypermis and Hydrocotyle leucocephala tend to do this in my aquarium. The result can be very messy and unattractive. Can this be avoided? Now, I realize the plants aren't doing this just to **** me off. They must need them for some reason. But I'm wondering if this is a normal phenomenon that can't be helped or if it's the plants' way of compensating for something they're not getting enough of. I recently started injecting CO2 into my water, so I don't think that's going to be a problem. I also add iron-based fertilizer at night once a week. But there's one component that I know my aquarium is lacking: light. It's a 40-gallon tank, with a large surface area (36"x18"). But I only have one fluorescent light, with a PowerGlo tube. Well, actually, I also use my old 10-gallon aquarium light at the back, which adds a bit of light through the narrow slit that isn't covered there, but it doesn't seem like a lot to me. With the surface area I have I assume my plants really need a second main fluorescent light to thrive. Anyway, I'm wondering if lack of light can explain the side roots. It doesn't seem quite right to me, because why would plants need roots to capture light energy? Don't the leaves do that? But what else can they be missing that's responsible for this? Unless it's a perfectly normal thing for the plants even under optimal conditions. But if so, why don't I see such ugly roots in pictures of healthy planted aquariums? In any case, I intend to build a cover with two fluorescent tubes in the near future. I'm sure the plants will benefit from this, possibly even gaining the upper hand against the algae (my aquarium isn't terrible in that way, but it has seen better days). What combination of tubes would be appropriate? I've read that PowerGlo, while pretty good for plants and for strong light (which I need to compensate for the lack of a second bulb), tends to promote algae growth. With a two-tube setup, would it be better to add a Aqua/Flora/Life-Glo instead of a second Power-Glo? Or maybe ditch the Power-Glo entirely and use something else? I want decent lighting that looks nice, is good for the plants and won't promote algae too much. Thank you for your help. Francois |
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