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Discussion Starter · #1 ·
This is an update for the topic that can be found here.

My dosing regimen has changed to this:

On days 1, 3, 5, and 7, I add:
NO3: 9.53 ppm
PO4: 3.25 ppm
K+: 12.82 ppm

On days 2, 4, and 6 I add:
.5 tsp. CSM + B (1.1 ppm Fe)

I have increased my CO2 levels to remain at or above 30 ppm at all times. Last four tests have given a pH of 6.4-6.6 and a KH of 4-5, which gives me a CO2 ppm in the range of 30-59.

I also added Jobe's sticks to the substrate here and there, because I suspect it is otherwise entirely depleted.

Despite all of this, however, growth is still slow and stunted. Ammannia senegalensis, however, is doing better, whereas Ludwigia brevipes, Alternanthera ocipus and Ludwigia sp. 'Cuba' are still stunting. Micranthemum sp. has stopped growing, as has Broad Leaf stellata. Ludwigia ovalis is losing older leaves and new growth is smaller. Even Ludwigia glandulosa has a few singed leaf tips. Spot algae is forming on the front glass and on the leaves of Cyperus helferi and the Alternanthera.

I think the only possible thing I have left to blame is the substrate, unless I'm missing something. Since the plants are not showing the colors that indicate nitrogen deficiency, I assume that it isn't the problem. There are dead areas and holes in the leaves of some species, particularly Ludwigia ovalis and Cryptocoryne pygmaea...could K be the problem?

Perhaps I could just double all doses and work down from there. This is infinitely frustrating :)
 

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Discussion Starter · #3 ·
Tap GH is 10...I very much doubt Ca/Mg is the problem, but I could be wrong. I've never specifically measured what constitutes the 10 GH...could be 99% Mg and 1% Ca for all I know, but I assume it's a mix of both since other planted tanks I've run before never stunted in this way and they had the same source water.
 

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Discussion Starter · #5 ·
I'm adding 1.5 teaspoons of traces every week. Now, I'm not sure that's a lot, but sure seems like it :)
 

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Discussion Starter · #7 ·
IUnknown said:
The problem with that is that you destroy the root structure and the plants are never able to utilize the substrate that well.
So, the increase in size is only the growth tips...? I would assume the roots would develop growth proportionate to other growth, especially if overall growth is increased. I don't think too frequent pruning is an issue, and I haven't had to do so in about 2 weeks.

Are the heavy water column feeders in your tank faring better than other species? Mine most definitely are. I have an Oriental sword that is clinging to life by a thread.

I was thinking Eco-complete, but I'm starting to hear bad things about it. And it's too darned expensive to gamble on.
 

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Discussion Starter · #8 ·
Just called my local water supplier.

TDS: 98 ppm
Hardness: 103 (I think this is mg/l but I am not sure how to convert it to GH)
Ca: 17.7 ppm
Mg: 7.05 ppm
 
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