Originally Posted by frozenoak
I am aware that rapid changes to an aquarium is hard on fish. When I get my ferts from Greg Watson should I immediately dump the required amount into the tank or do I need to add them slowly and build up to the concentrations that I need?
Nope, add them right into the tank. I add the poweder directly, some dilute in water first, some make solutions and dose mls.
You can also use test kits and adjust EI accordingly to whatever the range of nutrients you like to target. No rule against that either.
I often do not listen to my test kits, I listen to my plants.
Then I go back when the plants are happy and see what levels things are at.
Before suggesting EI I suggested this about a decade ago: http://www.sfbaaps.com/reference/barr_02_01.shtml
Folks where more skittish about dosing, but more folks had trouble testing and using junky kits, did not calibrate the test kits etc.
You'll note the more conservative amounts also back then.
Folks already where doing water changes so using that to make dosing easier for their already existing routine made things much easier.
PPS can use Test kits of not, you can do large water changes with that method and you can also not test by doing that.
The main difference is that PPS uses solutions much like PMDD, EI typically uses dry teaspoon measurements except for Traces.
Otherwise they do the same thing and both can be done with or without water changes over extended peroids, with or without test kits and Excel spreadsheets.
You can easily use PPS's SS and PS etc for dosing EI.
PPS/EI and any dosing routine that produced good plant growth has excess nutrients levels for a given growth rate. Otherwise you'd have poor plant growth and algae.
If it's a little excess or a lot, it does not matter as the upper ranges for the nutrients are extremely high except CO2/NH4.
Plants make the best test kit anyway, I change my dosing routines based on them much more than a test kit reading.