Posted: Fri Dec 05, 2003 2:17 pm Post subject: my plant leaf have brown dots and turning yellow
greetings to all. i have a peculiar problem my plant leaf is having brown spots and leaf is turning yellow and disintegrating, even the new leaf are yellow and some times partially brown, i am using pmdd of microsol-b as mentioned by mr. madan subramanyam in the forum listings.i have a tank size of 36x18x18 inch. the tank i have setup is one and half month old the substrate i have used is latrite of one inch, then 250gms of coco peat, above that i have one inch calcuim free sand of 2mm-3mm thick, i have 3 pcs of drift wood in the tank which i treated before introducing in the with algae remover, turmeric and hot water direct from the geyser for a week, i have planted(tying with nylon wire) anubias, java fern on the wood which is doing very fine, on the substrate i have few malayan sword, madgascar lace, baby tears, red temple, few other plants. filtration i have ehiem 2213 cannister filter with ceramic rings, volcanic rocks, sintered glass. lighting i am using 2x20w florocent tube and one 36w philips pll tube. i am using diy yeast method for co2, to dissolve the co2 in water i am directing the co2 release directly under the power head suction which sucks the co2 and mixes in the water and also agitate the water. i have couple of gold rams, rummy nose, few corydoras, neon tetras, sharks. i feed them tubifex and blood worms. i do water change every week. pls help me.
Joined: Jul 05, 2003 Posts: 509 Location: Bangalore, India
Posted: Fri Dec 05, 2003 11:46 pm Post subject:
The leaves with the holes and turning may be due to a potassium deficency. So add potassium in the form of potasium nitrate daily to your tank. Is the colour of the water in your tank brown? if so may be due to the tannin of the drift wood( may be another cause)
remedy change water more often.
Potassium nitrate can be added to your tank either in the powdered form of by mixing it in water. Try your self the dosage as over use wont harm any fish( stars by adding a pinch every day).
"..leaf is having brown spots.."
If the spots are like small pinholes and the sizes of the holes are slowly increasing, then it can be Potassium deficiency. Adding Potassium nitrate as Adip sugested, should help.
"..leaf is turning yellow and disintegrating.."
If older leaves are turning yellow and disintegrating, then can be Nitrogen deficiency. Sulfur deficiency also shows almost same symptoms. You can try 6 unit hot water + 0.5 unit potassium sulphate + 0.5 unit magnesium sulphate + 0.25 unit potassium nitrate mixture, 1 tsp per 5 gallons on start up and water change. It woked fine for me.
But as you are saying "..even the new leaf are yellow and some times partially brown..", then I think your tank has Iron deficiency, too. But, I am not sure about it, as you said you have 1" laterite in the bottom layer of the substrate. Guys, do you have any idea about the possibility of Iron deficiency even if you have 1" laterite in your substrate?
Also, I would like to know the advantages and disadvanteges you have found with coco peat?
Joined: Jun 29, 2003 Posts: 4259 Location: Chennai
Posted: Sun Dec 07, 2003 9:02 am Post subject:
You can use coco peat to create something like a blackwater extract by just boiling it in water and filtering the extract.
Good to use for South american dwarf cichlids and Tetras. Watch the ph though!!!
Im not sure bout their usefulness in a planted tank
Here is my part. Like every one said it looks to me like sulphur, iron and ntirate defficiency. SO I suggest to add propotions of kno3 and k2so4 on a regular basis on every water change because these defficiencies take a long time to recover. Long in the sense as long as 3 months for the plants to completely recover from the damages. As far as the iron def is concerned, the chelated mix that u add in the pmdd mix is quite good to take care of it as I use nothing more than that. SO just increase the chelated iron mix that you use along with the pmdd mix and does it regularly. Watchout for algae blooms cos excess iron will result in algae blooms and also carrodes certain plant leaves. For more details on this please refer to madans earlier posting on dosing k2so4 and kno3.
Joined: Jul 04, 2003 Posts: 1133 Location: Coimbatore, India
Posted: Sun Dec 07, 2003 3:41 pm Post subject: My few cents!!!
Allow me, sir...
This is the millionth time you are probably hearing this...... but....
hear it again...
Do massive water changes, to help remove unabsorbed nutrients that maybe building up.
For the nutrients you are pumping in, and the CO2 you are injecting, I frankly dont feel that you have enough lighting..
In the first place, if I were you I would run away from anything labelled "Algae remover", that you used to clean the driftwaood, because I have seen a tank collapse totally after this was used. Venket... are you hearing? Yes, I am referring to thaaaaat tank... :lol:
filtration i have ehiem 2213 cannister filter with ceramic rings, volcanic rocks, sintered glass. lighting i am using 2x20w florocent tube and one 36w philips pll tube. i am using diy yeast method for co2, to dissolve the co2 in water i am directing the co2 release directly under the power head suction which sucks the co2 and mixes in the water and also agitate the water.
If I were you, I would count out the volcanic rocks(if you are referring to anti ammonia rock), and also keep the agitation low. Keep the surface free of agitation, to minimize CO2 escaping from the water surface. Dont worry about O2 levels, as they will naturally shoot up, if your CO2 is supplied well to the plants.
For the nutrient that your tank seems to be lacking... visit:
I too agree the Potassium, Nitogen, Iron and Sulphur deficiency in your tank as others said. But from my personel experience of using Potassium nitrate, I would like to mention that sudden increase in nitrate level might kill your fish. So better increase your dose gradually. Worth reading this article (suggested earlier).
I would also suggest you to increase your lighting cause the broun colour might be brown algae which results from low light. If it looks like rust colered dust on the leaves (slimy layer of dark brown matter in advanced stage), then it IS brown algae or diatoms, not any nutrient defficiency. I will suggest you to increase your light close to 3watt per gall the brown colour too might appears from drift wood if they are not disinfected properly. Do try to check out for fungus like brown growth in your drift wood.
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