Identify deficiency/toxicity - Plant Deficiencies

galdadi · 11-13-2018, 04:12 AM

Hi guys, I posted some posts before, l'm dosing EI method. My tank is 300 l (79 gal), I give per week: nitrate 29 ppm , phos 9 ppm, potassium 35 ppm, mg 1 ppm and iron 0.84 ppm.
My water parameters are gh 8, kh 4 , pH 6.5, nitrate 10 ppm, phos 1.8 ppm, TDS around 250. Lights are 4*54w t5, 3 lumilux and one Sylvania growlux on for 8 hours a day.
I'm doing weekly 30% water change with RO water.
My plants doesn't seem to cope with my dosing method. Can you help me what I'm doing wrong?

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mistergreen · 11-13-2018, 07:18 AM

CO2 deficient most likely.

galdadi · 11-13-2018, 07:57 AM

Quote:

Originally Posted by mistergreen

CO2 deficient most likely.

I have drop checker with 4dkh solution, which is light green/yellow, and Milwaukee pH controller. Is there a way to be sure I have low co2?

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hoppycalif · 11-13-2018, 08:39 AM

You probably have around 100 PAR lighting, more than any of the plants I can identify need. With that much light having stable and high CO2 concentration is very critical. Also, any organic debris in the tank can encourage algae - very good tank maintenance is needed for that much light. I think I would start by cutting the light down, by using only two T5HO bulbs.

You can increase the amount of CO2 you use, if you do it very slowly, increasing the bubble rate slightly for a few days, and observing the fish to be sure they aren't suffering from it. If the plants seem to do a bit better, repeat this until either the fish show signs of suffering, or the plants don't do any better.

mistergreen · 11-13-2018, 09:31 AM

Safest bet is to reduce the lights and trim off the deformed and algae infested leaves.

galdadi · 11-13-2018, 09:48 AM

Quote:

Originally Posted by hoppycalif

You probably have around 100 PAR lighting, more than any of the plants I can identify need. With that much light having stable and high CO2 concentration is very critical. Also, any organic debris in the tank can encourage algae - very good tank maintenance is needed for that much light. I think I would start by cutting the light down, by using only two T5HO bulbs.

You can increase the amount of CO2 you use, if you do it very slowly, increasing the bubble rate slightly for a few days, and observing the fish to be sure they aren't suffering from it. If the plants seem to do a bit better, repeat this until either the fish show signs of suffering, or the plants don't do any better.

Ok but just to understand, my tank is 300 liter, and I have 4*54w which is 220w that means that I have less then 1watt/liter, which is as far as I understand, the ratio for high tech tank. Am I wrong? Or maybe the PAR is what determine??
Thanks!

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galdadi · 11-13-2018, 09:54 AM

Quote:

Originally Posted by mistergreen

Safest bet is to reduce the lights and trim off the deformed and algae infested leaves.

Cool I'll do that

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mistergreen · 11-13-2018, 02:07 PM

Forget the Watts/gallon/liter measurement. It doesn't apply to modern lights. They're too efficient and bright. PAR is what matters.

You had a thread up with your algae issue with this light. Now you see the effects on the plants. Too much of one thing isn't a good thing in finding that balance for your aquarium.

galdadi · 11-14-2018, 12:09 AM

Quote:

Originally Posted by mistergreen

Forget the Watts/gallon/liter measurement. It doesn't apply to modern lights. They're too efficient and bright. PAR is what matters.

You had a thread up with your algae issue with this light. Now you see the effects on the plants. Too much of one thing isn't a good thing in finding that balance for your aquarium.

You're right, I was not updated and looked at light in the old fashioned way...
I'll reduce to two lights which will be 70 par at the bottom according to online calculators, and look for improvement.
Thanks for the quick response!

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hoppycalif · 11-14-2018, 09:07 AM

You may find this informative: https://www.plantedtank.net/forums/1...ead-watts.html