the tales of two tanks - The Planted Tank Forum
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post #1 of 5 (permalink) Old 10-16-2015, 03:25 PM Thread Starter
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the tales of two tanks

I have two tanks setup.

Tank #1
145cm x 60cm x 60cm
~520 liter
pressurized CO2
150 watt MH, 8 hours/ day
temp: 27 deg C



Tank #2
60cm x 40cm x 60cm
~144 liter
pressurized CO2
LED DIY, 8 hours/ day
temp = 25 deg C



what ever i plant in tank #1, i also plant in tank#2, from same resources. , i also use the same substrate for both tanks.

but...

tank #1
glosso & baby tears grow leggy, anubias have green spot algae, growth rate is not as fast


but in tank#2
glosso & baby tears grow horizontally, not a single algae, and one i removed GSA infected anubias from tank #1 to tank #2, the GSA gone within a week, and the growth seems to be faster

anyone can tell me what is wrong with tank #1?

Last edited by Akaliman; 10-16-2015 at 10:50 PM. Reason: revision
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post #2 of 5 (permalink) Old 10-16-2015, 03:29 PM
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You answered your own question:

Quote:
tank #1
glosso & baby tears grow leggy,
Clear example of light level differences from what you are describing. Tank #2 has a higher amount of PAR. Your DIY LED system isn't putting out as much as the MH.
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post #3 of 5 (permalink) Old 10-17-2015, 06:31 PM
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What fertilizer dosing is done for both tanks? Your light in the first tank may be so strong that there is not enough nutrients for the plants because they have used it up faster. Metal halides frequently need to be raised a foot or even 2 feet above the tank to reduce light to acceptable levels.
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post #4 of 5 (permalink) Old 10-19-2015, 04:24 AM Thread Starter
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Quote:
Originally Posted by keymastr View Post
What fertilizer dosing is done for both tanks? Your light in the first tank may be so strong that there is not enough nutrients for the plants because they have used it up faster. Metal halides frequently need to be raised a foot or even 2 feet above the tank to reduce light to acceptable levels.
i used dry fert.
initially the first thank was 80cm hight, that's why i used metal halide.
I was still afraid that the light was not enough, so I reduced the water column to 60cm.

I am more than happy to reduce the lights, if that's the problem, as MH is power hungry.

i just checked the NO3 in tank #1, it was more than 100ppm.
I think its because of EI and discus's feed.
so i did 70% water change, and stop EI dosing. For now the macro fert will come from Discus's feed only.

I will keep the EI dosing for micro tho.

we'll see how it goes. I will update periodically.

thanks guys

Last edited by Akaliman; 10-19-2015 at 04:26 AM. Reason: grammar
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post #5 of 5 (permalink) Old 11-01-2015, 12:37 AM Thread Starter
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I decided to remove the discus fish, and now all the plants seems to grow.
keeping discus in a non mature aquarium is very difficult, the amount of food requires raise the nitrate level to above 50ppm.
unless you have an over planted tank, that level of nitrate is just algae inviting.

in this tank, i have to keep nitrate 5ppm at most, other wise algae takes over rapidly.
i trying to create a flat carpet aquarium for discus display, in this layout over planting just won't work design wise.
i thought about planting lots of stem plants in the beginning, then remove it later once mature, yes, but the stem plant will block the light, hence my glosso won't grow well.

for this tank, what works is keep the nitrate very low.
EI doesn't work either.
i only dosing KCl and sometimes iron.
with this setup, sometimes the new glosso show pale color, but I'm just gonna have to live it that. keeping nitrate low is the only way to keep algae at bay.
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