Personally, I'd grab some dry ferts and mix up a liter of each macro and a liter of the micro trace. Then use dosing pumps. Voila.
Cheap and easy. Emphasis on the cheap.
You still need to READ instructions, and pump the ferts.
With a small 10 Gal and CO2 and high light, you really are not saving any work, brain power etc dosign DIY vs brand names, if you want to spend more for water*(they still add the same NO3, NO3 is still NO3), that's your choice.
For a few$, you get a lifetime supply.
You can even ask folks here or use a dosign cal to make up a solution for ferts.
This is not brain surgery, it's not some insurmountable laborious chore.
You add a few grams to a few mls of water. That's it. You do it 1-2x and then it's old hat. At this day and age, I see no logical reason to use a commercial brand. All the work on dosing and making solutions has been done.
Would you send me 50$ and I'll make a few mls for you?
Then why do it for the commercial brands?