You dose something every day using the EI method. You alternate between micros and macros. Here is a post
about the EI method. It may help make sense of all of this.
As Darkblade asked, What size is your tank? This is important to calculate an appropriate dose. I merely gave you a basic EI solution since we have no specifics on your tank. Also, it would help to know your lighting level, whether you use CO2 or not and how often (how much) you do water changes. All of this changes the dosing amount and frequencies.
No you don't, I dose 2-3 x a week, EI has always done this, folks who like daily dosing, I suggested taking the week or two week's totals and dividing by 7 or 14 respectively. You can split it up any which way that gets the job done, but EI has always been a dry dose 2-3x a week type of thing.
Liquid calculations mess people up generally.
Once you figure it out, it's easy thereafter, but the dry dosing is as simple as it gets. Error on smaller tanks?
None I've ever had issues with using dry dosing personally.
But some folks seem to want precision when precision is not required.
Certainly no harm in that desire, but it's just not a requirement.
I kept a few 2 gallon and 6 gallon tanks for 2-3 years when I lived in Davis, CA. I never used liquid dosing.
Now I could make the argument for the traces, but again, even on larger tanks.....you can do dry, but mostly by convention and going from Tropica Master Grow and the CMS+B, I still make and use liquid for the traces.
So this is not consistent with total dry dosing zealotry
There is some hypocrisy but as said, back at the time, there was a lot of folks not using CMS+B, over time, it replaced TMG due to cost and mixing some DTPA in with CMS+B. At that point, no one could really note any significant changes.
So it's mostly an old "artifact" from the past.
Should we change it? Naww...not really.
Should folks all switch to liquid dosing?
For some, they find it easier.
Traces tend to take awhile to dissolve, and I mix other stuff in there also, so while not needed, no harm in doing that either. I'll tend to dose the traces a bit more frequently than the macros which I rarely every dose more than 2x a week.
It's an extra step, so liquids or a two part liquid dosing is okay I suppose, but it's not part of EI really, that is part of PMDD, EI just used that same approach but to many, the liquid stuff and mls, ppm's etc, made it tougher, and more hassle to understand, so EI just kept it as simple as possible.
Add 2-3 powders, add a few mls of traces based on your tank size, do a good sized water at the end of the week. Folks have long complicated simple stuff.
If you over dose, not a big deal, if you under dose a little, no big deal.
That's the point. I've suggested this(liquids) for folks with smaller takes if they WANT more precision, but I've yet to show it's a requirement.
Does not hurt either way. Nor is either way superior either.