SKU: 98222937689
fish tank plant fertilizer

fish tank plant fertilizer 2HR Aquarist APT 1 – Low-Tech Liquid Fertilizer

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Description

fish tank plant fertilizer 2HR Aquarist APT 1 – Low-Tech Liquid FertilizerAPT 1 is an all in one liquid fertilizer for aquariums with more fish than plants, and for new aquariums with aquasoil. The formula replicates the full balanced profile of APT 3 but without nitrates and phosphates because in fish heavy tanks, these nutrients are already supplied in sufficient quantities through fish food and waste. The result is maximum algae control combined with complete micronutrient delivery for healthy plant growth. APT 1 is 3

APT 1 is an all-in-one liquid fertilizer for aquariums with more fish than plants, and for new aquariums with aquasoil. The formula replicates the full balanced profile of APT 3 but without nitrates and phosphates — because in fish-heavy tanks, these nutrients are already supplied in sufficient quantities through fish food and waste. The result is maximum algae control combined with complete micronutrient delivery for healthy plant growth.

APT 1 is 3 times more concentrated than conventional fertilizers (in total soluble elements per ml), with components up to 50 times more bioavailable across a wide range of pH values.

Who is APT 1 for?

  • Aquariums with more fish than plants
  • New aquariums (first 1–3 months) with aquasoil
  • Low-tech tanks without CO₂ injection
  • Tanks prone to algae due to excess nutrients

How does it work?

APT 1 supplies potassium, magnesium, iron, and trace elements (B, Cu, Mn, Mo, Zn) without adding nitrogen or phosphorus. Plants use the nutrients already available in the aquarium from fish waste and the substrate, while the risk of nutrient oversaturation — the primary driver of algae growth — is kept to a minimum.

Dosing

  • 3 ml per 100 L daily
  • Recommended water change: 30% weekly
  • 300 ml (with pump) ≈ 3 months for a 115 L tank

Guaranteed analysis

  • NPK: 0-0-7 (+1.4)
  • Soluble Potash (K₂O): 7%
  • Magnesium oxide (MgO): 1.4%
  • Iron (Fe, chelated EDTA/DTPA/EDDHA): 0.09%
  • Trace elements: B, Cu, Mn, Mo, Zn
  • Safe for shrimp and sensitive fish

When to switch to APT 3?

After the first 3 months in a new aquarium, or once your tank has more plants than fish, consider transitioning to APT 3 — the full NPK fertilizer in the series.

Which APT fertilizer is right for you?

Product Best for NPK CO₂ needed?
APT 1 Fish-heavy tanks, new tanks with aquasoil No NO₃/PO₄ No
APT 3 Plant-heavy tanks, balanced aquascapes Full NPK Optional
APT e High-tech, Dutch style, EI method High NPK Yes

Frequently Asked Questions

What is APT 1 used for?

APT 1 is a liquid fertilizer for aquariums where nitrates and phosphates are already present from fish waste or a nutrient-rich substrate. It provides potassium, magnesium, iron, and trace elements without adding nitrogen or phosphorus.

Is APT 1 safe for shrimp?

Yes, APT 1 is safe for shrimp and sensitive fish when used at the recommended dosage.

When should I switch from APT 1 to APT 3?

After the first 1–3 months in a new aquarium with aquasoil, or when plants outnumber fish in your tank.

Can APT 1 be used in a tank without CO₂?

Yes. APT 1 is well-suited for low-tech aquariums without CO₂ injection.

Does APT 1 help control algae?

Yes. By withholding nitrates and phosphates, APT 1 reduces the risk of algae growth caused by excess nutrients — a common issue in fish-heavy or newly established tanks.

What is the difference between APT 1 and APT 3?

APT 1 contains no nitrates or phosphates and is designed for fish-heavy or new tanks. APT 3 provides full NPK nutrition and is designed for plant-heavy aquariums where the substrate alone cannot supply sufficient nitrogen and phosphorus.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
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SKU: 98222937689

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Crazyplantlady
Massapequa, US
★★★★★ 5
Great summer scent, easy to apply, non greasy.
We LOVE spray on sunscreen. So much easier to apply, especially to yourself in the harder to reach areas. My kids like it better too, doesn't take as long so they can get to the fun stuff. This smells great, I love summer scents. It doesn't leave you feeling greasy or like you've just tarred and feathered yourself in cream and then sand. It's an SPF 50, so extra strong and does well at protecting. I do wish it was a little cheaper, so I watch for it go on sale and stock up.
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Reviewed in the United States on April 18, 2026
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Chelsie
Fort Morgan, US
★★★★★ 5
Best sunscreen ever!!!
This is the BEST SUNCREEN. It’s all we use-and I know, I know it’s expensive (standard is $30 a bottle) BUT it does go on sale quite often for like $20 ish which is what competitors run for and this is WAY cleaner. It’s made of a lot of organic ingredients and this one smells summery but they have unscented options too-that’s normally what I get! You can get spf 30 or 50 and they both work so well, never been burned wearing it. It’s a fine spray that goes on clear and dries quick-no white cast, no rubbing in. We live in a hot state that is sunny a lot of the year so we need a good sunscreen year round and this ticks all my boxes. This is the best product coola offers!! My entire family uses it.
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Reviewed in the United States on April 4, 2026
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Aundria Steinmetz
Omaha, US
★★★★★ 5
1000% you need!
I originally bought this for our Honduras vacation thinking it was basically just a facial sunscreen—and honestly, it performed amazingly for sun protection. It was the only product we used on our faces the entire trip, and my husband even used it on his bald head. We were outside in the sun for 10+ hours a day, applied it only twice daily, and neither of us burned. What I love most is how it feels on the skin: it’s very lightweight, not heavy at all, non-greasy, and it absorbs quickly. It doesn’t leave a film, doesn’t make your face shiny, and it worked well for both of us—my husband with normal skin and me with an oily T-zone. Overall, I highly recommend it. Just keep in mind to use it as intended and follow proper sun-protection directions.
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Reviewed in the United States on May 23, 2026
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Andrea Aragon
Boise, US
★★★★★ 5
Good product!
Very luxurious ,light, I wear it on my arms bench and chest I feel moisturized not greasy
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Reviewed in the United States on May 25, 2026
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I.J.S
Dallas, US
★★★★★ 5
Great value for the money
Okay I was very skeptical of this product but I love it! I have used several product lines in the past and the dollar amount for what this is is a great value compared to what I have invested in in the past. I have mature skin and my skin is very dry because I live in the desert. I plan on keeping this as a go-to product for all my needs to help with the dryness of my skin and the bonus is that it does not smell horrible it actually smells really great
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Reviewed in the United States on April 3, 2026

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