Humic acids come in powder and liquid forms. While it’s alright to add the powder directly to your hydroponics system, it would be best to combine the powder with purified water before mixing it with the rest of the nutrient solution.

In the event that you are able to purchase liquid humic acid, you can definitely add the liquid form to the nutrient reservoir directly. Unlike nutrients and fertilizers, you don’t have to apply extremely large quantities of humic acid to begin stabilizing your system.

When it comes to humic acids, a little is sufficient, so adding more doesn’t really benefit your plants more. Just be sure to reapply regularly to maintain the supply in the system.

If you are interested in using humic acids for foliar spraying, add 20 mg/ml of humic acids for every 20 liters of water. For general system maintenance, dissolve 100 mg/ml of humic acids for every 100 ml of water.

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