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.

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SKU: 98222937689

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Cam D
Omaha, US
★★★★★ 4
Great Toy, But Not Durable
Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
I bought this toy for my five-month-old American Eskimo dog, and he loved it! My dog isn't a big squeaker fan, but he had so much fun with this toy. He played with it nonstop for about an hour, and it was so fun to see him enjoying his toy. Unfortunately, I had to take it away from him because after a while, he was trying to rip out the ridges that line the alligator's back. He managed to rip out two already and was working on his third. I'm afraid that out of boredom, he will try to tear off the rest of the ridges and then the alligator's teeth and claws. I think that I will have to snip off all of the small pieces before giving this toy to my dog again. Even though the toy didn't stay intact for longer than 30-45 minutes, I don't regret buying it. It instantly caught my dog's attention and kept it. This is a good toy. It has 16 squeakers and would be a good cuddle toy since it's soft and big. This toy is longer than my dog! It's about 30 inches long!
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Reviewed in the United States on September 9, 2011
D
Verified Purchase
Dawn Maynor
Port Orchard, US
★★★★★ 5
Holy Smokes, I Need Sound-Blocking Headphones
Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1)
This summer I bought the smaller version of this alligator squeaky toy for my large malamute-mix named Rascal. He's a big BIG puppy with an enormous amount of energy. Squeaky toys drive him crazy and he can't get enough of them. The more squeakers the more hyper he becomes. I started looking for the perfect Christmas present for him and caught sight of this little guy. Couldn't pass him up. 32 squeakers! Rascal would faint with excitement. This toy is a little longer than 4 feet long- which is about how long my dog is. It's by far the largest toy he's ever gotten. The head has a rattle in it. And the long body has 32 squeakers individually sewn into their own pocket- so even once he has chewed one of the noise-makers out, he still has many more to go. A few of the squeakers came defective, but I suppose that should be expected when so many noisy parts are involved. I don't think he noticed. The enormous amount of racket he made with the rest of them kept him busy enough. The second I gave him this toy he bounced around like any kid would on Christmas. Excited as heck. He spent a few good hours flinging the toy up in the air, running around the house and yard with it, and just laying around trying to chew each of those noisy things out from the body. He hasn't managed to get any of the squeaker toys out yet- it's been three days of constant play. He spends a few good hours on it each day. The fabric is getting kind of slobber-soaked, but that's presumable with dog toys. His dark black hair also easily sticks to this fabric, so it's beginning to look a lot dirtier than it actually is. But I'm sure he'll destroy it before my inner neat-freak feels the need to clean it. My biggest concern are the felt teeth and claws on the toy. They can easily be torn off and swallowed by the dog. If you want to eliminate that, prior to giving your dog the toy- just take a pair of scissors and cut them off. I just monitored my pup closely and took away the pieces once he removed them. Aside from the felt pieces and the fact the toy attracts hair- I think this was by far one of the best investments I've made for my dog. It's huge, keeps him entertained, and makes plenty of noise! I'm debating buying sound-blocking headphones before I purchase another toy like this again. Very noisy! But he loves it to death, and that makes it all worthwhile. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2013
P
Verified Purchase
Paige
Whiting, US
★★★★★ 5
My dog’s favorite toy
Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1), Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1)
This is my dog’s favorite toy! She carries it around everywhere and loves the squeaker. It’s a great size and keeps her entertained for a while. Holds up pretty well too, especially for how much she plays with it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
J
Verified Purchase
Jennifer Kalstrom
Waukegan, US
★★★★★ 5
"Gator" under supervision for husky pup is loads of fun for her.
Color: Squeaker Matz Gator, Size: X Large (Pack of 1), Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
Fun loving hyper 7 month old female husky whose an aggressive chewer loves her "Gator". She loves the squeakers, does chew on any & all parts of her toy as she like many textures from soft/fuzzy to hard. 1st Gator we got her lasted a few months. She did chew threw a good amount, it did get dirty & most of the 16 squeakers were missing but I saved like 5 of them & sowed them back in. Once she started chewing thru the head & into the stuffing we ordered a replacement & she's so happy. I have 1 picture of the Gator though it might not look like it's done it was. Zero squeakers remaining, head has 1/2 stuffing removed, torn stitches but not enough where the body could come apart. She managed to eat the stuffing but she was not hurtful & we were able to stop her each time. I recommend "Gator" w/ supervision if you have an aggressive chewing pup. It's durable enough for some tugging & "fetch". It advertised "encourages digging" @ the squeaker but she didn't. She tugged, chomped' "fetch" & whipped the toy w her head but had a blast every time. She actively searches for Gator when she wants to play w/ her toys. 16 squeakers.
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Reviewed in the United States on May 12, 2021
M
Verified Purchase
Martha Gonzalez
Alexandria, US
★★★★★ 1
Toy disintegrates - a hazard for dogs
Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1), Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1)
I buy these types of toys for my dogs. They rip them apart and pop the squeakers, having a great time. This is the third time over the past 2 or 3 years I've bought this particular toy. The quality has fallen off a cliff. Whenever my dogs shake it, flecks of the material fly off. These small pieces are very difficult to vacuum and, more seriously, get caught in my dog's teeth and throat. This never happened before, and they actually still have an old version that I occasionally resew with replacement squeakers. If you've bought this toy in the past couple of years, know that this is not the same product.
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Reviewed in the United States on May 3, 2026

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