m0useanswered grow question 3 years ago I'm not seeing any nitrogen based food being added into your regime.
your PH down product is also a citric acid based and is not as stable as other ones.
But it is working well for you so might as well keep using it.
I'd recommend you keep on doing what your are doing and try and get some added N fertilizer in there.
I'm new to the RQS tablet feeding guides and would be curious how strong that solution is it makes for your plants.
Best Of Luck!