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Artful Intelligence. The all-in-one liquid fertilizer for demanding planted aquariums. APT's concentrated, calibrated Capstone Formula grows the hobby's most demanding plants. Keeps the simplest tank thriving too. Complete NPK, micro & trace elements.
APT Complete (3) - Starter - 100ml is backordered and will ship as soon as it is back in stock.
Pickup available at Aquascape Shop
Usually ready in 24 hours
APT Complete (3)
APT Complete (3) - Starter - 100ml is backordered and will ship as soon as it is back in stock.
Three things APT gets right so your tank actually thrives.
Each drop of APT is packed with concentrated plant nutrition, formulated for modern planted tanks. APT contains 5× the amount of Phosphorus (P) and 6× Potassium (K) per ml, compared to older big-brand alternatives. Your plants get more nutrients for every drop.
More isn't always better. APT's nutrient ratios are tuned to bring out the deep reds and oranges in your plants without starving them of what they need to grow.
What's on the label and what plants actually absorb are two different things. APT's nutrients stay available across a wide range of water conditions so more of every drop reaches the plant.
APT Complete was developed by Dennis Wong, the planted aquarium scientist behind 2HR Aquarist's research approach. Every ratio is calibrated against real world growth data, not marketing assumptions.
It's the fertilizer we use in our own demanding tanks. High light, pressurized CO₂, dense planting, weekly water changes. If it didn't work for us, it wouldn't ship.
"We don't sell a fertilizer that requires a chemistry degree to use. APT Complete is what most aquariums actually need. Nothing more, nothing less."
3ml per 100L, once a day. That's the baseline. The 300ml pack ships with a calibrated 1ml/press pump so you can't get it wrong.
Try APT 1, comprehensive nutrition without nitrates and phosphates. Best for new tanks under 3 months and fish heavy setups.
Step up to APT e, supremely concentrated and expertly balanced for users who run EI methodology.
Algae usually means too much light or unstable CO₂, not too much fert. Reduce photoperiod first, dose second.
Three formulations for three kinds of tank. Most aquariums need APT Complete, but if yours is special, we have you covered.
Most fertiliser brands won't tell you this. We'd rather you buy once and succeed than buy twice and quit.
Algae outbreaks in young tanks are normal. Most are caused by inadequate cycling, not fertiliser. APT can't compensate for skipped steps. Plants take 2 to 3 months to adapt without CO₂. Look for improvement in new leaves, not old ones.
Going from very lean to very rich (or vice versa) forces plants to reprogram their cells, and that almost always triggers algae. Transition over 2 to 3 weeks. The longer slow growers have adapted to your tank, the harder it is to switch.
In mature tanks, plants adjusting to better nutrition release proteins that feed algae. Combined with accumulated waste on mosses and slow growers, this can briefly trigger blooms. Do a thorough water change after replanting to release trapped organics safely.
Mosses, Bucephalandra, Crypts, Java Fern, and Anubias can sit in stalled "Zombie" states for months. When you improve conditions, they accelerate shedding old leaves, which attracts algae. This is normal recovery, not failure.
These handle the edge cases that a single fertiliser can't.
A live bacterial supplement designed for aquasoil tanks. Stabilises biological filtration and helps tanks cycle faster.
Every photo below is a tank dosed with the APT range. Tag @2hraquarist on Instagram and yours might be next.
If you have a question that isn't covered here, our team replies to every email within one business day.
APT Complete (3) is the all rounder, built for tanks with more plants than fish, with full NPK plus macro, micro, and trace nutrition. It's the safe pick for the hobby's most demanding plants. APT 1 contains no nitrates or phosphates and is designed for fish heavy tanks or new tanks under 3 months with aquasoil, giving maximum algae control. APT e is the supremely concentrated formula for heavily planted Dutch style tanks and aquascapers running Estimative Index. If you're not sure which to pick, start with APT Complete.
Yes. APT Complete contains no copper or zinc above trace levels and is used safely in shrimp tanks worldwide, including with Crystal Reds and Caridina species. As with any fertilizer, dose accurately and observe your livestock for the first week.
At 3ml per 100L per day, a 300ml bottle lasts roughly 3 months on a 30 Gal / 115L tank. The 100ml Starter ships with a calibrated dropper, the 300ml Standard with a 1ml/press pump. The 1000ml bottle works out to the best price per ml, worth it for multiple tanks or larger displays.
Algae is almost always caused by excess light or unstable CO₂, not fertilizer. APT Complete's ratios are tuned to provide enough nutrition for healthy plants without leaving excess in the water column. Persistent algae usually means it's time to reduce your photoperiod or check CO₂ stability.
We ship across NZ with NZ Post (overnight to most cities) and offer DHL international shipping to Australia and the Pacific. Liquid fertilizer ships in protective packaging and is fully insured. Free shipping on NZ orders over $150.
Unopened bottles can be returned within 30 days for a full refund. If you're unhappy with your results after using the product, get in touch. We'd rather help you dial it in than lose a customer.
No. APT Complete works in tanks without CO₂ injection. Plants in non CO₂ tanks just take longer to adapt (typically 2-3 months instead of a couple of weeks), so look for improvement in new leaves, not old ones. Two small tweaks help in low tech setups: dose a bit less (e.g. 2ml per 100L daily, or 3ml every other day) since low light plants consume nutrients more slowly, and if your tank is fish heavy, APT 1 is a better fit with the same complete trace mix and no added nitrogen or phosphorus.
Most aquascapers see visible new growth within 14 days. A drop a day, in a tank that finally lives up to what you imagined.
One of the best all in one fertilizers I've used. Plants are thriving with rich color and steady growth. Noticeable improvement within a couple of weeks.
Joe G., verified buyer
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