Nope. Not with correct dosing EI, especially double dosing.Is there a chance that Iron can become low even with EI?
That's nice reply, but did you hear about precipitation issues or other problems with PO4 and Fe? Why do you place blame on CO2 all the time? Right now I suffer strong PO4 deficiency in two of my plants in my tank where I add more then 3 ppm PO4 each week. But I'm quite sure you would explain it as CO2 problem.
This why you dose macro & micro alternate days. If you mix macro and micro in a bottle you will get a precipitate (assuming pH is right), but due to dilution and alternate days this generally won't happen in the tank. This has been researched and measured and is not an issue in a tank.but did you hear about precipitation issues or other problems with PO4 and Fe
Yes. He measured the maximum possible nutrient uptake of plants and EI is based on providing more than this, thus you can forget about nutrient levels and concentrate on important controllable and measurable things like CO2 (and light).Tom Barr is suggesting that you can forget about nutrients, but is this right?
Yes. The EI values are nutrient levels beyond what a plant needs.So you seriously doubt that I can have PO4 deficiency in my tank, although you don't even know what my tank look like
It can't be lack of nutrients causing deficiencies as you are dosing values beyond any that a plant can use, thus it only leaves CO2 to be the issue.Im suggesting that defficiencies are a function of the relation nutrients+CO2
It can't be lack of nutrients causing deficiencies as you are dosing values beyond any that a plant can use, thus it only leaves CO2 to be the issue.
I had a pump failure once and dosed 1litre of double strength macro into 180litres, giving NO3 at over 300ppm and PO4...well high... for a couple of days before I realise what had happened. No algae, no extra plant growth, fish not concerned only issue was me in having wasted 1litre of solution...
Another thing is the levels at which they do better, and this Im sure depends on other things like CO2.
Whose theory ? How do you know you have low PO4, have you measured levels using laboratory grade tests ? You are dosing EI, you cannot have low PO4, there will always be sufficient, thus plant issues are not due to macro ferts, just leaving CO2 (and light) as the cause of the issues.According to your theory if I have too low PO4
No. The EI values are maybe half of what a fast-growing plant may really need for maximum growth.Yes. The EI values are nutrient levels beyond what a plant needs.
I'm not any newbie in EI. Do you think I'm aTry it, watch the plants.
That's the biggest cliché being repeated again and again without any scientific evidence ... or I would say contrary to all scientific evidences. I can show you many scientific papers stating that for most fast-growing aquatic plants (which tend to have the biggest demands on nutrient uptake) the non-limiting level of CO2 is somewhere around 20-40 ppm (0.5-1 mM) under full sunlight (1500-2000 µmol.m.s.). There's a lot of scientific evidence for this. So contrary to what EI people (or T.Barr) say no one probably needs more then 30 ppm CO2 for non-limiting growth of his plants. And even when you have 10 ppm CO2, most aquatic plants will do just fine.It can't be lack of nutrients causing deficiencies as you are dosing values beyond any that a plant can use, thus it only leaves CO2 to be the issue.
I have another experience: Once I added by mistake nearly 30 ppm PO4 into my tank. The next day I measured only about 5 ppm PO4, and the third day the concentration droped to zero! You may never be sure you have enough nutrients in your tank ... especially with regard to PO4.I had a pump failure once and dosed 1litre of double strength macro into 180litres, giving NO3 at over 300ppm and PO4...well high...
Jose, I don't know if I got it yet, but the above comment reminds me of something. Few months ago I did some tests with nutrient uptake, and find out that when the external nutrient concentration in water was 30 ppm NO3, 3 ppm PO4 etc. my plants were able to use up 7 ppm NO3, 0.4 ppm PO4 etc. per week. But when the external concentration was lower (15 ppm NO3, 0.5 ppm PO4) my plants were able to use up only 4 ppm NO3 and 0.2 ppm PO4 per week. So I agree that the real nutrient uptake by plants depens to a great extent on the external concentration of nutrients. Also I read that plants are able to somehow rearrange their uptake mechanisms according to the nutrients which are in least supply. They are not able to do it for all nutrients, only for some of them, but if some of these nutrients are in short supply, the plants can activate some mechanisms for better uptake of these nutrients (for example they can build some enzymes which can extract the nutrients from dissolved or particulate organic matter also). So the Liebig law of the minimum doesn't apply here, because when some nutrient becomes the most limiting, the plants do their best to improve the mechanisms of its uptake, and also they do their best to lower the need for other nutrients! So the plants are actually working hard so that all the nutrients were in some kind of equilibrium. In other words, if they have enough NO3, K, Ca, Mg etc. but too little PO4, they lower the uptake of NO3, K, Ca ... but improve the uptake of PO4. So in the end the plants adapt themselves for optimal uptake rates under given conditions.This doesnt proof my theory wrong still. One thing is how much plants consume. Another thing is the levels at which they do better, and this Im sure depends on other things like CO2.
Yes but I have also heard dosing liquid carbon at high levels can cause some plants to turn white.I have noticed lately that some of my plants turn white like stayrogen repens and monte carlo. I am double dosing macros and micros. Is there a chance that Iron can become low even with EI?