Sad plants

[grumpy]

Hello,

Please take a look at the pictures below and tell me if you know what could be the problem with my plants.

The tank (240 l Juwel) gets water changes 20% weekly and the plants get some nutrients. Light is on about 15 hours a day.

The plant in the first picture is almost dead... you can hardly see some green left in it, the rest is almost brown.

Thank you for any advices.

 

[Faramir]

Standard Juwel "comes with the setup" lighting? i.e. about 1 Watt per gallon, tubes not noted for their plant growing qualities?

 

[SnakeIce]

low light is likely a cause in the first pict but also that could happen if there is a change in the system, as in lighting, ph, hardness, or changes in the nutrient supply.

the second picture looks like a combination of macro and micro nutrient deficiencys. I will have to go look at my refferences to say for cirtain what those are but the symtems of quite a few of them overlap.
potassium is the nutrient lacking when old leaves start to get holes in them
that is the most glaring deficiency but I am sure there are others

I would suggest getting a print out of the elements used by plants and what the deficiencys look like. my computer skills are still developing so could some one give a link to such info, that would be great

 

[grumpy]

Thank you for the advices.
I will try a new nutrient: Florenette A from Sera.

Faramir - they say the 2 tubes that came with the tank are good for plant growth.

SnakeIce, I will try to find a product that provides potassium that the plants need.

 

[Faramir]

Originally posted by grumpy
Thank you for the advices.
I will try a new nutrient: Florenette A from Sera.

Faramir - they say the 2 tubes that came with the tank are good for plant growth.

Alas this is not true. It is not intense enough for one thing - you need at least 2Watts per gallon for good growth. I think you'll find the tubes you've got give you nearer 1.

 

[djlen]

Grumpy - Here is a link that will help:
http://www.csd.net/~cgadd/aqua/articles.htm
Scan down to "nutrient deficiencies". There are also a number of good topics on that page.
I'm unfamiliar with a '240 I Juwel', but you do need to have a minimum of 1.5 watts/gal. for success with most plants.
Len

 

[Skittyfish]

Pure potassium is K2SO4....I think some usek a salt substitute called Nu-Salt, or No-Salt. And I think Salt-Petre also. You could check out the ingredients on them. (I use pure K2SO4)

 

[djlen]

K2SO4 or KCl for K.
Salt Petre for N.
Len