Need help with my Amazon Sword plants - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 11-06-2005, 05:34 PM Thread Starter
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Need help with my Amazon Sword plants

I planted 6 20" tall amazon sword plants in my 180g. After six months, Problems:

1. they are getting pale green,
2. the tip of the leaves are turning brown,
3. there are holes on some of the leaves.
4. the new leaves are shorter than the old leaves.

My tank:
size:
180g (6'x2'x2')

light:
2 x metal halide (175w x 2 ) 6500k on for 4 hours/day
2 x VHO (140w x 2) 50/50 on for 10 hours/day

Substrate:
schwaltz profile

Fertilizer:
jebb tablets in the substrate and liquid fertilizer monthly.

Fishes:
11 cichlids (ave 5")
20 other dither fishes (mainly mollies and swordtails)

Water:
pH - 7.6~7.8
gH - 280 ppm
kH - 300 ppm
Nitrite - 0
Nitrate - 40~60

Please help!
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post #2 of 7 (permalink) Old 11-06-2005, 06:00 PM
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the first possible culprits I see are: Lighting and water ferts (are you using CO2?)
50/50 will have little benefit to your plants, and 4hrs with the MH is a little low for that size tank. HM typically cover 2'x2' area and your tank is 6' long. I would replace the 50/50 and go all-out 10K or 6500K. Swords still get some nutrients from the water. It is possible you have deficiencies in: phosphates, Mg/Fe, K, or all of them. With your lighting and dosing the water column CO2 is a must IMO.


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post #3 of 7 (permalink) Old 11-06-2005, 06:12 PM Thread Starter
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You know, given the choice, I would rather have slower growth instead of additional lights. wife very unhappy with the energy bills therefore i started with no CO2 and lower lights.

it seens like it is not working, sigh
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post #4 of 7 (permalink) Old 11-06-2005, 06:13 PM
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I will type very slow so it's easier to understand.

Just replace the VHO bulbs for a increase in usable light. The energy bills will remain the same.
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post #5 of 7 (permalink) Old 11-06-2005, 09:35 PM Thread Starter
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Quote:
Originally Posted by Rex Grigg
I will type very slow so it's easier to understand.

Just replace the VHO bulbs for a increase in usable light. The energy bills will remain the same.

Hi Rex, thanks for helping. replace the vho to normal fluorescent tube? I thought the vhos suppose to produce more light? or just producing the wrong light?

I have tried using just the MHs, but didn't help either.

thanks
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post #6 of 7 (permalink) Old 11-06-2005, 09:46 PM
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Replace the 50/50 VHO lights with a more plant friendly VHO bulb. Something in the 5500k-10,000k range would be the best choice.

Also try dosing some potassium and traces. Even some phosphates.
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post #7 of 7 (permalink) Old 11-06-2005, 10:18 PM Thread Starter
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Got it, thanks Rex.
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