Tropical Fish Keeping - Aquarium fish care and resources

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-   -   why are my wisteria and moneywort dying?!? (http://www.tropicalfishkeeping.com/beginner-planted-aquarium/why-my-wisteria-moneywort-dying-27930/)

ichthyologist in training 08-24-2009 02:55 PM

why are my wisteria and moneywort dying?!?
 
I had a 10 gallon planted tank with bamboo, wisteria and moneywort. I used to have all 3 before and they all thrived. Ive recently had to purchase new plants (a roommate cleaned the tank and threw out the plants except the bamboo). However the wisteria and moneywort seem to be dying. The leaves are turning yellow then brown and wilty until they fall off and float to t he surface. PLEASE HELP!!
Thanks!!

Byron 08-24-2009 03:12 PM

Inadequate light and/or nutrients cause the leaves to yellow and fall off. Sometimes inadequate light causes only the lower leaves to do this while the upper (closer to the light source at the surface) are fine [this is comon with stem plants and you can pull them up, trim off the lower portions, and replant]. As you mention they grew fine before, have you changed the light (duration, type of light...) or changed fertilizers or fertilizing from previously? And how long have you had the new plants? Sometimes different water parameters set back plant growth at first, and they recover. It could be any one or a combination of these factors.

ichthyologist in training 08-25-2009 12:53 PM

I havent really changed anything I use in the tank since i started it almost 2 years ago. I dont use nutrients, should I, or will it affect the fish? I got my new plants maybe 2 weeks ago. Maybe I should get some new light bulbs?

Byron 08-25-2009 04:29 PM

Quote:

Originally Posted by ichthyologist in training (Post 233211)
I havent really changed anything I use in the tank since i started it almost 2 years ago. I dont use nutrients, should I, or will it affect the fish? I got my new plants maybe 2 weeks ago. Maybe I should get some new light bulbs?

What type of light (fluorescent tube, incadescent screw-in), and what wattage? The problem may be the light, your answers will help sort this out.

As for nutrients, it depends upon the light, fish (they provide nutrients and may be sufficient) and plants. We already know the plants; how many fish and what type? As this is recent, it probably isn't the nutrients as you say the plants were fine for 2 years, but we should explore all the possibilities.

Byron.

ichthyologist in training 08-25-2009 06:46 PM

2- 50watt, incandescent bulbs
as for the fish i have:
1 glo-tetra
1 silverhatchet fish
1 dwarf puffer
1 glowlight tetra
2 red-tail rasbora and
1 other tetra ( cant remember the name)

Byron 08-25-2009 07:09 PM

Quote:

Originally Posted by ichthyologist in training (Post 233393)
2- 50watt, incandescent bulbs
as for the fish i have:
1 glo-tetra
1 silverhatchet fish
1 dwarf puffer
1 glowlight tetra
2 red-tail rasbora and
1 other tetra ( cant remember the name)

Fluorescent (tube) light would be preferable, but as you have the incandescent hood, try the compact fluorescent bulbs. They come in different "colours" of white, like cool white, warm white, intense white. They will give more light for less power (energy savings:-)) and produce less heat which is another plus over your tank. Lower wattages would work, maybe the equivalent of 25 w (not sure what this is in CF wattage) intense white. That would approach full spectrum, ideal plant light.

You've probably sufficient nutrients from the fish, although a good fertilizer like Seachem's Flourish Comprehensive plant Supplement might help, with new light. It would take very little, half a tsp treats 30 gallons only once a week (after the partial water change), so you'd be using a few drops. I would get new bulbs and see what happens. Back to the original issue, it is in my view primarily lack of adequate light that is causing the leaves to die off. Most plant authors say it is impossible to grow plants long term with incandescent light. I think this would solve the problem.


Byron.

ichthyologist in training 08-25-2009 07:18 PM

alright, thanks Byron. I'll pick up some new bulbs. Im suprised the the ones I have are still working-theyre the same ones the tank came with 2 yrs ago.

teddyzaper 08-31-2009 03:42 PM

well in some lights the uva/uvb runs out even though the light still poduces light. u can test it somehow but i forgot. that could be it although idk if plants need uva/uvb....

Byron 08-31-2009 04:31 PM

Quote:

Originally Posted by teddyzaper (Post 236172)
well in some lights the uva/uvb runs out even though the light still poduces light. u can test it somehow but i forgot. that could be it although idk if plants need uva/uvb....

You're correct, even though fluorescent tubes still "light" the intensity (strength) of that light diminishes rapidly and eventually is too low to be of use with plants. I don't know if this is uva or whatever, but ithe weakening does occur. You can measure the light output with a lux meter; an aquarist I know did that, and found considerable loss of intensity after just three months, and then a slower but steady decline continuously. Most plant authorities recommend changing the tubes every 12 months. Although I don't notice the depreciation during those 12 months because it is gradual, when the new tube is in I certainly notice it much stronger/brighter.

ichthyologist in training 09-04-2009 10:29 PM

Alright, as you suggested I got new 25watt bulbs for my tank and my plants seem to be doing a little bit better; the wisteria are getting their color back, but the moneywort is still looking a little brown. However since tuesday( the day i put the new bulbs in) I have gotten a green coating on many of the shells and and bamboo in my tank. Is this just the new bulbs doing their job and strongly encouraging algae growth?


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