m0useanswered grow question 2 hours ago PH is to low IMO. I'd aim for 6.2, give yourself some room to wiggle. 5.8 or lower is so close to cutoff and lockout and PH drifts in the medium.
Any liquid fertilizer that is readily available will have a broad range for uptake by the plant. 5.8-7.5, the lower PH on DWC is more so to help control the other things that grow in the water from my understanding.
I'd try that bit first, also water when it needs it. not a specific amount daily. be religious about runoff to prevent buildup and correct the feeding concentration based off of the plant needs. It will tell you if its to much or or little.
This is a good starting point for EC range on plants.
https://www.thcfarmer.com/threads/med-man-method-ppm-ec-chart.73326/
Its not 100% so alther it when needed.