I think you are over-doing and over-thinking.
Firstly I'm not sure what are those white worms you are mentioning. It could just be planaria as parasitic worms only lives when there is fish as host. I suggest stop treating the tank as it might affect cycling.
Secondly, tank cycling can take up to a month. I won't bother test the water for the first week. Just do frequent weekly 25-50% water changes with dose of anti-chlorine if top-up from tap
Thirdly, plant heavy. Meaning as much plant mass and CO2 dosing as high. Lighting stick to 4hrs initially and observe plant growth. Nutrient dosing not need as your aquasoil has lots of nutrient. Maybe only add K until tank is cycle. Plants also need to acclimatise and if too much nutrient is in the water, algae will take advantage and bloom.
Fourth, I would temporary add activated carbon or since you have chemipure and remove once tank is cycle. I will add seachem purigen as it can be regenerate by you when it becomes saturated and use it continously in the filter.
And lastly, do not add any other chemicals to complicate things. Just do water change, light dosing, short light timing, observe and wait. Don't worry about your pH or tds as your tank is cycling fishless. Everything will stablize after a few weeks. Just wait.
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