TMG big concern with Iron: Alternanthera reineckii

Hi,

First, many thanks for this great forum. I recently fell on EI method and for me it is a complete success.

I have the tank in my signature, with this actual photo (I pruned the plants yesterday night, and the backward plants are no longer covered by the too huge Limnophila)



My big concern is dosing Iron using TMG: I have a big stock of TMG that I bought before hearing about CSM+B :-(
For my tank, the recommended dose by TMG is 20ml weekly. If I follow the EI recommandations, it will be 10ml twice a week.

The problem is that 10ml of TMG will add only 0.05ppm Fe for a 40G tank, so I'll end up with only 0.1ppm /week. If I follow this scheme, my tank will be always low on Iron (undetectable). I actually add about 60-80ml of TMG/week, so about 0.3-0.4 ppm Fe and my Iron is kept between 0.1-0.2ppm

I'm concerned about my dosing and what I read from people using TMG. Am I dosing too much? Should I dose TMG only 10ml twice a week and add Iron separately like in E15?

Why Am I being concerned? Because of the look of my Alternanthera reineckii:





You see that new leaves are healthy, but older leaves are a pity. I'm being concerned since the bad looking leaves are not that old (only 3 generations), are well exposed to light and I don't see any deficiency in my tank:

- CO2 is dosed by a PH meter (verified by RedSea PH drops) + permanent drop checker and they coincide
- I dose PO4 to maintain it between 0.5-1ppm
- I dose NO3 to maintain it between 10-25ppm
- I add K2SO4, 20 ppm on water change and 10ppm on otherdays with macro
- I dose TMG to maintain Iron 0.1-0.2 ppm
- I have 4x54W T5 Osram Lumilux De Luxe 965 (216W) for a 60G tank (but only 40G water, measured for sure)
- PH 6.6, KH 3 and GH 3-4
- I don't dose Ca or Mg

Other plants are doing fine (Crypto, Echino, Ludwigia Repens, Ceratophyllum Demersum, Egeria, Limnophila sessiflora and aquatica, anubia B. var nana, Hygrophila Polysperma and Corymbosa), the growth rate is amazing and I have no algae problems at all. Maybe one concern is my Limnophila aquatica that doesn't stay well dense at the bottom if I don't prune and replace the stems. The foliage quickly dies into a burned black aspect. The Sessiflora variety is doing much better

Limnophila aquatica:


continued on next post...

 

Cryptocoryne:



Ludwigia Repens:



L. Sessiflora + H. Corymbosa



L. Aquatica: not doing that well if not pruned and stems replaced by new ones



What do you think about my Altercanthera look?
And what about my dosing of TMG: is it any accumulation causing this aspect?

Really many thanks for your help

 

I'm greatfull for such a prompt answer,

Please, would you clarify or link me where I can find why 4xT5 bulbs are the cause for my Altercanthera look?

I'm indeed adding about 60-80ml TMG/week for a 60G (40G real water volume), that's 3-5x the maximum stated by EI and my iron, by many tests, is always between 0.1-0.2, never above.

What I don't really understand is that the recommanded doses of CSM+B will add about 0.5-1ppm of iron /week. On the other hand, EI recommanded doses of TMG (let's say 3x15ml for a 40G) will only add about 0.2ppm iron /week

So how do you explain that difference. Following EI + TMG for micro, iron could be really limited that way, especially after a water change of 50%

Anyone using TMG + EI can clarify the math behind it for me? And any other ideas about my Altercanthera look?

Really many thanks again for any help/comment

 

Many thanks for having clarified it,

In fact, 2 weeks ago, the problem was only on bottom leaves and very slow. Since 1 week, I had to stop my Nanostream 6055 (that was activated 2x/h for 2mn) beacause of one of my Apistogramma C. was sadely killed when it entered the pump enclosure while it was stopped. I'm waiting for two TUNZE Universal pump Mini 5024.04 (40-80 G/h) to replace it. Because of their smaller power, I could let them active all the time during the light period.

Also, I installed 2 weeks ago an Eheim surface filter because of the thin fatty film on surface: I had to decrease my Eheim 2028 performance manually because it was too strong for the surface aspiration valve. I didn't install an Y on the tubing to solve it since I'm waiting for my external CO2 diffuser that will lower the filter performance making it useless to install an Y

So, two interventions that suerely decreased the flow in the tank. I was aware of them but didn't think the impact will be so fast.

I'll try to reactivate the nanostream 6055 + a protection filter for fish, till I receive my external CO2 reactor and the new weaker Tunze pumps.

Really many thanks for having pointed it as I really didn't realise it could be so important.

About the T5 bulbs, I didn't think it is so different than T8 in fact. I even was thinking to add my spare 2x39W T5!!!!

About the TMG dosing routine, I tried to use 3x10ml and 3x15ml /week. I ended with iron measures below 0.05ppm all the time (15ml will add 0.07ppm to my tank. After one day under my lights, the iron level is quiet undosable because lower than 0.05ppm). Any one can reassure me for sure about using TMG that way? Still concerned because of in the EI method the iron needs are estimated to >0.5ppm/week. 3x15ml TMG in my case only supply 0.2ppm/week, with half of it removed during water change of 50%


Many thanks again for your support, I really appreciate it

 

Many thanks Tom for your advice,

I didn't think it needs to be in a shaded place. Since it is a red plant, I thought it will need good light. I first will try with improving flow. I reactivated the Nanostream 6055 on a timer. The new pumps should arrive next week. I also put some ceratophyllum above the Altercanthera to shade it

Abou the CO2, I have a drop cecker too, and the color is rather showing too much CO2 than less. I found it hard to dose CO2 without a PH meter...

A last question: will it be a good idea to dose only 3x15ml TMG and add iron separately (E15,...), to spare some TMG while maintaining a good level of iron that 3x15ml TMG doesn't provide in my case?

Many thanks again anyway for your great support

 

I'm so greatful to have so many interest for my first post/topic here

I understand what you are suggesting. I'll stick with 3x15ml TPN (indeed, I have the TPN branded one, not the TMG).

Today, I switched on my Nanostream 6055, 1mn every 15mn. I'll remove it once I receive the slower pumps. After your post, I also just added an Eheim compact 1001, at 600 LPH to the front of the tank and all the leaves are now slowly moving.

In my CO2 drop checker, I add the Dennerle liquid. My fish is doing very well indeed, no symptoms at all. The color is always steady lime-green also. My CO2 flipper is on the right corner of the tank with the filter output directed near it. The drop checker is exactely on the opposite left side. The filter aspiration is on the same side as the drop checker but enough away from it.

I'll also receive next week an external CO2 diffuser to avoide any gradiant of PH/CO2 from one corner to another

Finally, I forgot to tell you something important: On 14 Feb I moved to a new city and from a tap water of KH 6-GH 12 to a tap water of KH 17-GH 14 . I had no choice than to begin a mix distilled-tap and I targeted lower parameters: GH4-KH3. I was doing small water changes until 2 weeks agao when I begun EI. Last week, just after my 2nd 50% water change since I begun EI, I lost my two Neritina and most of my Red Cherries I didn't have any death or disease in my tank for the last 4 months. That's why I thought I overdosed the TPN (but my Salifert cupper test is showing 0). The water I used for my change was very different than in the tank (KH 6 / GH 9 / 700µs vs KH3 / GH4 / 125µs). The water is heated before the change and I changed it slowly on 1h. It could be an osmotic shock that killed them too and not the TPN overdosing as I thought.

Anyway, feel free to put any further comment about my Dennerle drop checker or teh position of my flipper/checker, I'll be really greatful

Many thanks again for all your advices

 

Many thanks again for all this feedback. I think my CO2 gradiant was really important as I had to switch my PH meter from near the flipper to the opposite side. It was making my CO2 valve switching on/off every 2mn. I really improved drastically the flow after your comments. I also will try to solve the Altercanthera issues and change its position.

Finally, I lost again many shrimps after my waterchange of yesterday, despite having added only 15ml of TPN

So, I think you are right. Overdosing TPN didn't cause my problems as I thought. The Altercanthera was too exposed to light as you say and the waterchanges with two different parameters caused my shrimps to litterally explode :-((( crying :-((( I didn't think they are so vulnerable as I really took many precautions (change on 1h, same temperature)

I hope that there are still some in my external filter that will multiply

Meanwhile, any feedback on the Dennerle CO2 checker?

Many thanks for all of you

 

Hi,
They are Red Cherry. Also my 2 Neritina died the same day after the 50% water change. I also lost most of my Melanoides at the same time. My Physa marmorata are doing rather well on the other side, even if their population, like all my snails, is very limited and well controlled since many months.

After every water change, my red cherries population is decimated now. The major difference between the two waters is conductvity: 120 vs 700 µs giving a final tank conductivity after the water change of 400µs, so quiet half the initial tank conductivity. Could it lead to osmotic shoks for my snails and shrimps?

In that case, how could I preserve my shrimps while still changing 50% water /week. Things should solve once the tank slowly gets to the same parameters as the water I use for the changes. But this could take some few other changes and I'll loose all my shrimps till then :-((

 

Thanks,

That's what I planned to do also. I'll also take a look at the external filter to see if there are still some rescued shrimps in it. Usually it is their reproduction unit