To go one step further, there is anther regime out there called Method of Controlled Imbalances (MCI). I believe there is some discussion here on it, but there is a massive thread over on APC about it. Something to look at and the guy really did his homework on it. Some here would dispute its claims since the "perfect science" is not really a perfect science. But you throw that in the mix of comparison with EI and PPS Pro and your head will spin.
Try them all I say. Find what you find gives you the most positive gains with the most rewards. One is not always meant for another.
I'm sorry, that guy did not do his homework.
Nor did Edward with PPS, do not like it, show that I am incorrect about this.
Case 1, MCI.......This is about algae control with ferts. You run around every algae type and and simply end up doing nothing but PMDD, limiting PO4 at the end of the day, actually several months. This is no different than doing PMDD, then adding PO4 after all you have algae wise is GSA.
It's not about growing plants.
Why not resolve the issue right from the start?
There is no basic understanding of plants or algae here, it's just PMDD and then adding PO4 back later.
Why did you have algae to start with in these cases?
Where is the control?
PPS pro, please..............please, for the live of anything Green and leafty..........detail how this is different from PMDD?
Paul Sears explicitedly pointed out the goal was limited PO4, about 0.2ppm he suggested. So adding KH2PO4 to PMDD was suggested. The dosign is the same, the concentration and the amounts are the same and target goals are the same.
The people have CHANGED, taking another's method and claiming it as their own is simply put: wrong. Paul and Kevin have never been given credit where is has LONG been due. I give them lots of credit for EI. Even the math to estimate the dosing ppm's is contained in there, I just argued for plants, not worrying about algae and added more.
In fact, all 3 of these all add the same things.
The only differences is in the amounts.
EI simply suggested that excess ferts do not cause harm and that providing a non limiting amount provides a reference for ferts that is independent, and I've followed this up for over a decade on CRS, Dicus, Rare catfish, 300+ species of plants. I've shown these brood to folks in local clubs, in national clubs and on many forums. Same with scapes, algae and plants.
I think I have done my homework.
Modified Hoagland's solution is used in agricultural, plant, environmental, Ecological studies to provided non limiting reference control so that other interactions are not dependent on nutrients.
No method in aquarium dosing has ever suggested this except.........EI.
If some one adds more PMDD, they end up with EI.
If someone 2x the water changes as PMDD, they end up with EI
If someone doubles the CO2, they have EI.
If someone cuts and slowly adjust the EI down by 1/3rd, they end up with PMDD.
I wanna know why PPS does not give credit to PMDD and a helping heaping to Paul and Kevin. I've been picking on this bone for about 8 years now, never did get an answer. I got no issues given plenty of credit where it is due. Also got no issue ripping those that not and claim stuff as their own.
They rightly deserve it.
These methods all add the same things.