Anubias, light and ferts - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 09-08-2014, 04:09 AM Thread Starter
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Anubias, light and ferts

So I have some previously healthy anubias in my 40breeder low tech. No C02 but add excel daily and occasional flourish and API leaf zone once a week. Even had one flower. Have always had a few black spots of algae but nothing bad. However, lately been seeing more black spots uniformly across the leaves. My anubias nana has also started turning yellow. I do have some fast growers and wonder if they are hogging nutrients. My nitrate level is 5ppm and phosphate is 0.25ppm. I did add an extra strip of lights in the last month but the increased algae and leaf yellowing seem to predate that problem. Any thoughts?
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post #2 of 11 (permalink) Old 09-08-2014, 05:55 AM
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Your anubias has some kind of deficiency which means your missing something either macro or micro. The ferts your using aren't covering all your needs. Anubias are very slow growers and can survive with very little nutrients. They do best in the shade and low intensity lighting. I've had them survive weeks with no light other then the ambient light from the room they were in.

If your dosing Excel everyday it's similar to having CO2. You need to start EI dosing if your going to use excel.

Heres is some reading.

http://www.barrreport.com/showthread...on-CO2-methods

http://www.barrreport.com/showthread...ss-techy-folks
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post #3 of 11 (permalink) Old 09-08-2014, 04:09 PM Thread Starter
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I suspected as much. Currently adding a capful of N, half cap of P and two caps of K twice a week (SEACHEM). Also one cap of flourish and 10 ml of API leaf zone once per week. Finally one cap of flourish trace once every other week. Was trying to avoid doing full EI as I want to keep this relatively low tech and only do water changes every 3 weeks
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post #4 of 11 (permalink) Old 09-08-2014, 05:04 PM
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Got pics of the anubias?

The Fraternity of Dirt #112

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post #5 of 11 (permalink) Old 09-08-2014, 11:02 PM
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What lighting are you using - what brand, what specific light fixture? If you have more than low light you will need to dose adequate amounts of NPK or the plants will be starved. Faster growing plants will use up the nutrients, leaving little for the anubias.

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post #6 of 11 (permalink) Old 09-09-2014, 02:40 AM Thread Starter
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I have a 36 inch current satellite plus LED and a smaller 24 inch of the same brand (only one strip on this one). Both are on for 6h in the evening. I do have some pennywort and water sprite that grow pretty fast.

You can see some of the spots and yellowing of leaves
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post #7 of 11 (permalink) Old 09-11-2014, 03:30 AM Thread Starter
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Here is a better pic showing some of the problem.
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post #8 of 11 (permalink) Old 09-11-2014, 04:43 AM
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Why don't you just try dosing the tank per the EI method, https://www.plantedtank.net/forums/sh...ad.php?t=21944 just to see if it helps? If it does help that would show that you do have too much light for the amount of fertilizing you are now doing.

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post #9 of 11 (permalink) Old 09-11-2014, 04:48 AM
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If you are not using CO2 gas.then use roughly 1/4 EI dosing rates, so if the tank calls for say 1/2 teaspoon, use 1/8th.

You do not need that much Ferts without CO2 gas.

If you do not use Excel or CO2 gas, then maybe 1/10th or even a little less if you have a decent fish load.




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post #10 of 11 (permalink) Old 09-11-2014, 09:09 AM
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It looks like N deficiency, older leaves yellowing.
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post #11 of 11 (permalink) Old 09-11-2014, 12:34 PM Thread Starter
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I dose excel daily. I am using EI low light dosing as per online calculator. But as someone stated anubia leaf yellowing seems to indicate N deficiency so I'm confused. I do have relatively fast growing stems ie water sprite, pennywort and even my cabomba seem to put on noticeable growth daily. My N levels are 5 ppm and P levels are 0.25ppm which suggests I need more fert even without CO2

I should clarify, the fert schedule I mentioned earlier is actually less than recommended by low light EI and I have actually just increased fert dosing this week. So far no explosion of algae but somehow does not feel like low tech anymore lol.

Last edited by Darkblade48; 09-12-2014 at 03:53 AM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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