woodyship

I have this problem and i need your help i tried many things but it is not working
My tank is 55L only and i used CO2 and LED light, also i add 5 ML or All-in-One fertilizer
https://www.co2supermarket.co.uk/all...ants-p299.html
also 1.5 ml excel.
any idea please on this problem

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hoppycalif

How are you making sure you are using adequate CO2 for the amount of light you have? Often a shortage of CO2 can stunt the growth of the plants so you get yellowed or rotting leaves. How long has it been since the plants were in the tank? What specific light fixture are you using, and does the data you have for that light tell you how much PAR you get from it at a specific distance?

woodyship

Actually, I run 25 PPM of CO2 for 4 hours ON then OFF 1 hour, and ON again for 4 hours all on and of with the light.
The plant in the tank for more than 3 months for the 1st and 2nd pictures, and 1 month for the last one.
For lighting it is LED for Plant aquarium you can see specification here
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Zapins

Looks like potassium deficiency to me. Old leaves with holes in them and yellowing. The dose you are adding is a bit low for your 55 L. Try doubling the dose per day to 10 mL.

The description of your ferts say 5 mL in 40 L of water gives:
Each 5ml dose adds:
1.5 ppm Nitrate
0.4 ppm Phosphate
1.6 ppm Potassium
0.2 ppm Magnesium

hoppycalif

How are you measuring the concentration of CO2 in the water? Is the tank a 55 gallon or 55 liter tank?

woodyship

I am injecting 30PPM and i used https://www.co2supermarket.co.uk/co2...iums-p302.html
to check the CO2
and it is 55L

woodyship

SO what is the proper ppm for (Nitrate, Phosphate, Potassium and Magnesium)?

Zapins

There is no exact ppm that will definitely work. Because each tank has a different number, species and set of growing parameters that cause the plants to use nutrients at different levels.

One of the more successful methods of fertilizing is called estimative index where you overdose fertilizers so the plants never run out and never stop growing from deficiencies.

These are the general ranges that seem to work for most people.

EI target ranges:
CO2 range 25-30 ppm
NO3 range 5-30 ppm
K+ range 10-30 ppm
PO4 range 1.0-2.0 ppm
Fe 0.2-0.5ppm or higher
GH range 3-5 degrees ~ 50ppm or higher
KH range 3-5

More info here:
https://www.aquaticplantcentral.com/f...ing-guide.html

hoppycalif

A "55L" tank could be a 55 gallon long tank, or it could be a 55 liter tank, two entirely different tanks, requiring different light fixtures. What are the dimensions of your tank?

woodyship

It is Width 29cm X 56cm length X 30 height