If you need something fast and accurate, I think the CleanGrow Nutrient Analyzer is the best option on the market.
We use Watermax in the greenhouses at UC Davis to reduce scale and biofilm. It reduces a lot of maintenance when used regularly.
If you want to make your life easier, I highly recommend being proactive in the fight against hydroponic issues, and not reactive. This is a great product to start with.
CleanGrow's nutrients work well both in my DWC systems and my flood tables using coco and smart pots. I espectially like how clean they are, they do not stain the roots.
I would recommend Fertmax to any aspiring or veteran gardener. It will definitely help you with your green thumb.
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