wooo, you got yourself lota chemicals... since you now have the potassium, maybe you can save the Fleet Enema for its intended purpose lol
For dosing, I think you can either add in drops (dissolved solution) or simply adding powder directly. But for smaller size tank, like your and my 20G, adding dissolved solution is probably easier and more accurate. I used a small syringe for dosing, easy to measure volume.
And altho the PMDD formula says mixing all the trace+K+NO3 etc together, I think it maybe a good idea to keep them separate, as each tank's condition maybe different. So you may not need so much NO3, for example. For my 20G, right now i'm only dosing my DIY trace (with extra Fe, plus Mg and K). Haven't added any NO3 or PO3 at all and the plants are growing quite well. I do have a large fish load which provide enough NO3/PO3 tho. So YMMV
For dosing, I think you can either add in drops (dissolved solution) or simply adding powder directly. But for smaller size tank, like your and my 20G, adding dissolved solution is probably easier and more accurate. I used a small syringe for dosing, easy to measure volume.
And altho the PMDD formula says mixing all the trace+K+NO3 etc together, I think it maybe a good idea to keep them separate, as each tank's condition maybe different. So you may not need so much NO3, for example. For my 20G, right now i'm only dosing my DIY trace (with extra Fe, plus Mg and K). Haven't added any NO3 or PO3 at all and the plants are growing quite well. I do have a large fish load which provide enough NO3/PO3 tho. So YMMV