Here's my current routine in the spreadsheet. Micros tend to get changed every couple of weeks but this has proven to be a pretty good default recipe. If I make a few tweaks and something doesnt work out I go back to something like this for a while (usually)
* In the spreadsheet for micros is says 7x a week, but that's not full doses. I add half a dose of micros on macro days. Started doing this a couple months ago, more or less on a whim as a result of a Fe deficiency, and Ive just kept on doing it. In the spreadsheet for micros is says 7x a week, but that's not full doses.
Other known tap water content, from both testing and water report
Ca - 40
Mg - 4
SO4 - 7.65
Na - 1.79
Cl - 9.14
As some of you know for the past few months Ive been experimenting with higher B and Zn levels, and having really good results.
Early on when I was starting out with lower levels, similar to whats in csmb and other edta based products, I saw some weird deficiency symptoms. A few stem species developed really short internodes, a couple of other things developed chlorotic white spots and/or holes in the general range of 3-4 sets of leaves down from the top. Increasing B and Zn eventually solved it.
Interesting note on Seachem products
(of which we are using the exact same compounds except for Fe)
First keep in mind that Flourish comp isnt meant to be a stand alone source of micros, its designed to be used along with Flourish Trace. Despite the marketing hoopla it's basically just a source of Fe (gluconate)
Getting back to B and Zn, since we are using the same compounds as Seachem I think it is relevant to see what Trace provides:
At the recommended dose
B - .0016 ppm
Zn - .101 ppm
Helluva ratio, huh?
Dosed at .5 Mn adds almost 1 ppm of Zn
Ratio-wise you wont find anywhere close to that much Zn in any other commercial product, agricultural study, plant research, Hoaglands, nothing. At best you'll find something around a 1:1 B:Zn ratio.
Why does seachem use so much? @fablau
posed the question on their forums and they said its based on their research of what plants need...yeah right. My theory is they use so much because unchelated Zn simply doesnt stick around very long.
Either way since we're using the same compounds I think its a good idea to follow in their same general footsteps.
On the EDTA chelate:
It is important to note that edta only breaks loose from Fe around 6.5 PH. To all the other micros it remains bound much higher.
So the problem here is edta Fe - IF your PH is much higher than 6.5 for any length of time. My tank for example is only under 6.5 during the photo period when the co2 is on. Overnight it degasses up to around 7.4. So for at least 14-15 hours every day it gets way above 6.5.
When edta breaks loose from the original compound there are a couple of potential issues:
One is all that edta is now free to bind with other stuff. In addition to other micro elements it has a high affinity for Ca, and other things too but Im not sure exactly what all else. This additional binding may or may not be a problem.
Edta is also not biodegradable. It just sticks around building up like the macros we add, only removed by water changes.
The other potential issue, and perhaps the most significant, when the chelate breaks loose Fe is in whatever raw state it was in before. At the very least precipitating out, and almost certainly binding with P and who knows what else. Fe is very volatile, which is why it needs an appropriate chelate relative to PH.
The other micros are not so critical. It's more important in agricultural use where you might fertilize the soil every few weeks. Everything needs to stick around as long as possible in an available state. It becomes less important dosing every day or two like we are.
Csmb is 65% EDTA
Great thread @Greggz
, I know @slipfinger
had a hand in doing this too so thanks to you both. Im sure that collectively we can learn a lot as more folks share their anecdotal experiences. The more the better.
As far as the hobby goes thats really all we have when it comes to the whole micro debate. Still so many unknowns how various compounds behave and interact under various conditions. Anyone who pretends to know it all is either delusional or just plain full of crap.