I used EI so no need to be super precise. I know some people get scales to measure things out when they make solutions. I bought
to be able to measure 1/8, 1/16, and 1/32 teaspoon. Not sure if they have those at Walmart, but wouldn't hurt to look.
I used fert calculator
to give me the ppm I needed to dose. Then I used conversion caculator
to convert the ppm to teaspoons and then did the math to get as close to that number as I could with my measuring spoons.
I have soft water so I use GH booster, if you have harder water you could use KH2PO4 instead. I also use KNO3, K2SO4, Plantex CM+B, and iron chelate.
This is just an example using my 29 gallon when it was low tech.
Monday-50% water change (important if you dose according to EI. You could use PPS Pro, but I prefer this way). 1 tablespoon GH booster, 9/32 KNO3, 1/32 K2SO4
Tuesday- 3/8 Plantex, 1/32 iron chelate (when/if you calculate iron chelate keep in mind the Plantex has iron. Probably has enough iron, I just used a tiny bit more for my red plants to no ill affect)
Wednesday-9/32 KNO3, 1/32 K2SO4
Thursday-3/8 Plantex, 1/32 iron chelate
Friday, Saturday, Sunday in low tech I added nothing. When I went high tech I just added an extra day of macros on Friday and micros on Saturday while still resting on Sunday.
If you're doing low light and not lots of fast growers you could probably get by with just dose macros one day and micros another and letting it go the rest of the week.