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Forum: Fertilizers and Water Parameters   Today, 05:49 AM
Replies: 128
Views: 4,311
Posted By Marcel G
Counter-attacking some flawed claims

It seems like EI people are prone ignoring those kinds of information that do not fit their concept of high CO2 need. I do not ignore the fact that many users have positive experiences with EI, and...
Forum: Fertilizers and Water Parameters   Yesterday, 08:08 PM
Replies: 128
Views: 4,311
Posted By Marcel G
Very good point

+1
I really like this argument. For me it's another example of very well made point, although it doesn't use any scientific data but common sense only. Thank you very much for your point, Canuck!
...
Forum: Fertilizers and Water Parameters   Yesterday, 07:34 PM
Replies: 177
Views: 9,909
Posted By Marcel G
You don't need to accept any challange here....

You don't need to accept any challange here. "Nothing new under the sun" (Ecclesiastes 1:9). Just look at ADA tanks and see the results.
Forum: Fertilizers and Water Parameters   Yesterday, 07:22 PM
Replies: 128
Views: 4,311
Posted By Marcel G
Black-and-white war

roadmaster, your posts seem to be often very offensive and attacking IMO with too many general misconceptions. For example, you say that practicing limitation is not likely to improve anyone chances....
Forum: Fertilizers and Water Parameters   Yesterday, 11:16 AM
Replies: 610
Views: 37,154
Posted By Marcel G
What about trying to replace a small part of the substrate?

@fablau (http://www.plantedtank.net/forums/member.php?u=20525), what about trying to replace a small part of the substrate? I would try to replace 8x8" of substrate somewhere in the corner, and use...
Forum: Fertilizers and Water Parameters   Yesterday, 10:56 AM
Replies: 177
Views: 9,909
Posted By Marcel G
Is the uptake efficiency important with luxurious supply?

I don't understand how does this explanation relate to your PPS method.

The nutrient content (%) in plant tissue based on the dry matter analysis can be considered as a raw guide for knowing...
Forum: Fertilizers and Water Parameters   Yesterday, 08:39 AM
Replies: 177
Views: 9,909
Posted By Marcel G
Reactions

Just add to Audionut's reply:
While cations (ions with positive [+] charge) don't create bonds with each other (with some rare exceptions that have nothing to do with our hobby), if there are...
Forum: Fertilizers and Water Parameters   Yesterday, 05:10 AM
Replies: 177
Views: 9,909
Posted By Marcel G
I think Audionut's point was that when plants...

I think Audionut's point was that when plants have enough CO2, they won't resort to HCO3 uptake.
Forum: Fertilizers and Water Parameters   Yesterday, 04:56 AM
Replies: 177
Views: 9,909
Posted By Marcel G
Dosing system: Is it really needed?

Hoppy, my goal with this experiment is definitely not to invent another fertilizing method. It's just find or verify the nutritional requirements of a representative sample of aquarium plants, so...
Forum: Fertilizers and Water Parameters   02-06-2016, 05:32 PM
Replies: 177
Views: 9,909
Posted By Marcel G
As far as I know PPS Pro recommends to add weekly...

As far as I know PPS Pro recommends to add weekly 5-10 ppm NO3, 5-20 ppm K, 0.1-1 ppm PO4, 20-30 ppm Ca, 2-5 ppm Mg, 0.2-0.7 ppm Fe, and it ignores the role of a <substrate...
Forum: Fertilizers and Water Parameters   02-06-2016, 10:39 AM
Replies: 177
Views: 9,909
Posted By Marcel G
Deficient vs. Sufficient (normal) vs. Excessive (toxic)

The concentration or ranges of the major elements and micronutrients in mature leaf tissue generalized as deficient, sufficient or excessive for various plant species (comparison of data from Munson,...
Forum: Fertilizers and Water Parameters   02-06-2016, 07:24 AM
Replies: 177
Views: 9,909
Posted By Marcel G
Plant's mineral nutrition & elements ratio

I would add the following:

First, predictions about how the plants will behave when nutrients are in short supply, are numerous. Among the best known are mainly Redfield's ratio and Liebig's Law...
Forum: Fertilizers and Water Parameters   02-05-2016, 02:54 PM
Replies: 177
Views: 9,909
Posted By Marcel G
O2 measurements

Yes, the O2 measurements were done with lights on (during the photoperiod). I can do it with light off, but I have already finished the test with R.wallichii (no plants in my test tanks now), and...
Forum: Fertilizers and Water Parameters   02-05-2016, 02:20 PM
Replies: 177
Views: 9,909
Posted By Marcel G
Experiment update: Rotala macrandra

Experiment plan:

Test #1) Tropica's Easy: Ludwigia sp. 'Red' (http://www.plantedtank.net/forums/11-fertilizers-water-parameters/962425-nutritional-requirements-aquarium-plants.html#post8595105)...
Forum: Fertilizers and Water Parameters   02-05-2016, 05:26 AM
Replies: 3
Views: 184
Posted By Marcel G
I add to the praise: Your summaries are always a...

I add to the praise: Your summaries are always a good read, Diana.

A side note: The average soil substrate contains about 40 grams of iron per 1 kilogram, which should be more than enough for many...
Forum: Fertilizers and Water Parameters   02-04-2016, 07:13 PM
Replies: 128
Views: 4,311
Posted By Marcel G
Growth rate vs. efficiency

This thread should discuss the concentration of inorganic plant nutrients in water column that have negative impact on organisms in our tanks.
That being said, it's clear that the nutrient uptake...
Forum: Fertilizers and Water Parameters   02-04-2016, 05:32 PM
Replies: 128
Views: 4,311
Posted By Marcel G
Agree

Thank you very much for your explanation! Now, I finaly got your point, and as in the case of c9but it makes a lot of sense now. I must admit (in the light of your explanation) that my effort to put...
Forum: Fertilizers and Water Parameters   02-04-2016, 04:06 PM
Replies: 128
Views: 4,311
Posted By Marcel G
As you know I too can get upset quite easily. But...

As you know I too can get upset quite easily. But appreciate you are able to apologize. That's rare.
Forum: Fertilizers and Water Parameters   02-04-2016, 03:00 PM
Replies: 128
Views: 4,311
Posted By Marcel G
Hats off!

I have greatest respect to this argument! It seems logical, and well formulated. Thank you for it. It makes me think of it.

Let me ask you just one question: Why only one side of this dispute is...
Forum: Fertilizers and Water Parameters   02-04-2016, 02:32 PM
Replies: 128
Views: 4,311
Posted By Marcel G
First of all, thank you for your post, isonychia!...

First of all, thank you for your post, isonychia!
I'm far from giving you any directive advices as to what amounts should you use or not.

That's actually very good question! Unfortunately, you...
Forum: Fertilizers and Water Parameters   02-04-2016, 08:53 AM
Replies: 128
Views: 4,311
Posted By Marcel G
If there is no specific paper ...

Although many scientific studies are not directly applicable to our planted tanks, there are many implications that may apply well. To downplay all the research just because it has not "freshwater...
Forum: Fertilizers and Water Parameters   02-04-2016, 08:29 AM
Replies: 128
Views: 4,311
Posted By Marcel G
First I would like to say that I really like your...

First I would like to say that I really like your post, which made me think of some things. So thank you for it!
Now let me comment some of your 'opinions and feelings' (as you name it):

I...
Forum: Fertilizers and Water Parameters   02-04-2016, 07:30 AM
Replies: 128
Views: 4,311
Posted By Marcel G
EI-users' claims

I don't know if you understand my point in the first post (or elsewhere).

My point is that EI users (not me!) say that EI levels are harmless for aquarium critters, and that EI levels of nutrients...
Forum: Fertilizers and Water Parameters   02-03-2016, 08:08 PM
Replies: 128
Views: 4,311
Posted By Marcel G
Difference between science and pseudo-science

I don't understand your logic (sorry). Let's say we have some fish, and we want to find out what concentration of nitrates will kill 50% of the fishes during 96 hours. Do we need to define what are...
Forum: Fertilizers and Water Parameters   02-03-2016, 06:48 PM
Replies: 128
Views: 4,311
Posted By Marcel G
The value of science

Thanks for your post, and let me respond to some of your objections:

I see no need for such amendment, because after one find out what concentrations can be toxic to critters (based on scientific...
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