You can grow pounds with simple Jack's formula which cost 20€ per year. Just want to know ingredients so I can simple google each one and see potential benefits etc.
You always need to buffer. Ideal pH for growing is between 5.8-6.5 and if the water is different from source to source, you may not always fall in this range. No product on the market is actually self buffering. You don't NEED to buffer because the plant will grow in a lot of different conditions but if you're outside the range listed above, you're not going to get as good results.
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