Quote:
Originally Posted by Tom Barr
PMDD also limited PO4 to the point is reduced CO2 demand as well.
So 15ppm was fine.
However, they used 1.5-2 w/gal max back then also using plain old T12 FL light.
Some seem to overlook this, almost on purpose.
|
Ha!
Never thought of that, but not on purpose :-)
While I never understood misunderstanding of PMDD concept (it was NOT limiting P to limit algae)
Excellent remark.
Quote:
Originally Posted by Tom Barr
The ADA As works very well with non CO2 methods as well BTW.
|
Precisely.
There is no any “soil methods”, really.
Put a rich enough substrate (as ADA’s Aqua Soil or Profile/Turface + earthworm castings), and you can lower light to such extent that you can switch to “non CO2 method” without any water column dosing at all, at any moment… without totally remaking your tank… and do backwise, again at any moment… again without totally remaking your tank…
And non CO2 method means lessen light to lessen nutrients demand (including CO2) – no more (shorter “peak”, for example).
I also like very much possibility with rich substrate to make huge water changes without massive water column dosing while eradicating algae* (if you don’t – plants will not start to grow well and algae will never go away, without taking plants together with them, I mean
)
while not dosing at all with
pure substrate for this period means no plants growth = no algae death.
This often leads to mistakes – it is needed to have a good practice to catch the moment when you should start a little dosing liquid ferts during massive WC to feed your plants and do not feed algae (close to the end of this period).
Rich substrate gives possibility to relax and just do water changes by means of “brainless technology” – plants will take Whatever they need, and Whenever they need from substrate.
* I guess this method called “resetting the tank”.