One of the shortcomings for all aquaponics systems has been the ability to provide the systems with the right combination of trace elements to grow blooming plants. This is not to say that the nutrients in fish waste aren’t ample to grow tomatoes, cucumbers, peppers, squash, beans, zucchini, etc. because we have been able to grow them. However . . . fish waste alone doesn’t produce ENOUGH iron, magnesium, calcium and potassium to continually grow large amounts of these blooming plants. This is one of the key reasons that aquaponics has been slow to commercialize. It’s a fact that greens (lettuce, basil, kale, etc.) can be grown in almost any aquaponics system very successfully in almost any climate. But the trick is to consistently grow blooming plants that produce multiple crops of (example) tomatoes, peppers, cucumbers, squash, zucchini, and beans on fish waste alone because the required blossoming-supportive nutrients are quickly stripped out of the water and blooming plants cannot continually blossom and grow plants that produce fruit/vegetables without adding chemicals because of nutrient deficiencies; fish waste alone does NOT produce ENOUGH iron, magnesium, calcium and potassium to continually grow blooming plants that produce food in aquaponics.
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