The best aquarium plant fertilizers for 2026
Even the best light and CO2 stall without nutrients. We compare all-in-one liquid ferts and root tabs, and give you a no-nonsense dosing routine for low-tech tanks and demanding, high-light aquascapes alike.
2HR AQUARIST · premium all-in-one · 500 mL
APT Complete
A concentrated, carefully balanced all-in-one aimed at demanding aquascapes — full macros, iron and traces in one bottle, with low copper so it stays shrimp-friendly. The enthusiast's default.
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AQUARIUM CO-OP · all-in-one liquid · 236 mL
Easy Green All-in-One
The easiest way to feed a planted tank: one pump-bottle of balanced NPK plus iron and traces, dosed a couple of times a week. Forgiving, fish-safe and hard to get wrong.
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TROPICA · all-in-one liquid · 300 mL
Specialised Nutrition
The European planted-tank staple: a complete all-in-one with macros, iron and micros for tanks with plenty of plants. Weekly dosing with a tidy pump makes it easy to live with.
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NILOCG · all-in-one liquid · macros + micros · 500 mL
NilocG Thrive
A highly concentrated all-in-one liquid that bundles macros and micros in one pump bottle. Aimed squarely at medium-to-high-tech planted tanks, it dilutes to cover a huge volume, making it one of the best-value complete ferts going.
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SEACHEM · root tabs · 40 caps
Seachem Flourish Tabs
Gravel-planted root tablets that feed hungry root-feeders directly at the source. The perfect partner to a water-column liquid for swords, crypts and other heavy feeders.
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SEACHEM · comprehensive supplement · 500 mL
Seachem Flourish
A long-standing comprehensive supplement rich in iron, trace elements and micros. Excellent alongside a nitrogen source in low-tech tanks, though on its own it is light on macros.
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SEACHEM · iron supplement · 500 mL
Seachem Flourish Iron
A targeted iron supplement for tanks whose plants — especially reds — want more iron than an all-in-one provides. A booster, not a standalone fertiliser.
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TROPICA · micro + trace · no N/P · 300 mL
Tropica Premium Nutrition
The micro-focused half of Tropica's liquid range: iron, potassium and trace elements with no nitrogen or phosphorus. Purpose-built for lightly-stocked low-tech tanks where fish waste already supplies the macros.
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SEACHEM · single element · potassium · 500 mL
Seachem Flourish Potassium
A single-element potassium supplement for keepers who dose by components. It does one job — raise potassium without touching nitrogen or phosphorus — which makes it the fix for pinholes in leaves, not a standalone feed.
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API · potassium + chelated iron · 8 oz
API Leaf Zone
The fertiliser you find on every big-box shelf: cheap, simple, and just potassium plus chelated iron. Fine as a first fertiliser for easy low-tech plants, but it lacks nitrogen and phosphorus, so it is not a complete feed.
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