JBL ProScape Fertiliser Line Review: NPK Fe and Solo Bottles
German brand JBL has been a stalwart of the European planted-tank scene for decades, and their ProScape range is arguably the most accessible split-bottle fertiliser system available in Singapore. While Tropica’s all-in-one bottles dominate beginner shelves and ADA’s Brighty K-Step lineup commands premium attention, the JBL ProScape fertiliser system sits in a useful middle ground — proper macro and micro split, sensible bottle sizing, and reasonable Singapore retail pricing. After running the line across multiple show tanks at Gensou Aquascaping at 5 Everton Park, here is the practical breakdown.
The Four-Bottle Concept
JBL ProScape is built around four bottles: NPK Macroelements (nitrogen, phosphorus, potassium together), Fe Microelements (iron and trace), K Macroelements (potassium-only top-up) and N Macroelements (nitrate-only). Most home tanks need only NPK and Fe; the standalone K and N exist for diagnostic dosing when one element runs deficient. This is a more flexible system than single-bottle all-in-ones for hobbyists who want to actually understand their tank chemistry.
NPK Macroelements: The Workhorse
The NPK bottle delivers a balanced ratio of nitrogen, phosphorus and potassium suitable for moderate-to-heavily planted CO2-injected tanks. The bottle is light blue and ships in 250 ml, 500 ml and 1 L sizes. Singapore retail is SGD 18-25 for 250 ml, SGD 30-40 for 500 ml. Recommended dose is 5 ml per 100 litres twice weekly for moderate tanks; aggressive dosing can push to 10 ml per 100 litres three times weekly for stem-heavy Dutch layouts. The fertiliser range at Gensou stocks all four bottles.
Fe Microelements: The Iron Driver
The Fe bottle is the green-bottled trace blend with chelated iron, manganese, zinc, copper and boron. This is the bottle that actually drives plant colour intensity, particularly in red stems like Rotala rotundifolia and Ludwigia super red. SGD 15-22 for 250 ml. Dose 5 ml per 100 litres three times weekly, ideally on alternating days from NPK to avoid trace-macro precipitation in concentrated form.
K Standalone: When Potassium Falls Short
The K bottle exists because some tank chemistries — usually those running heavy ferric phosphate dosing — develop potassium deficiency that the NPK bottle alone does not correct. Symptoms include pinhole holes in older Echinodorus leaves and stunted Rotala growth. SGD 14-20 for 250 ml. For most beginners, this bottle stays in the cupboard untouched. Diagnostic dosing only.
N Standalone: For Low-Nitrate Tanks
The N bottle is pure nitrate supplementation for high-light tanks where biological nitrate production cannot keep up with plant uptake. Heavily planted tanks pulling nitrates below 5 ppm by mid-week show stunted new growth and pale young leaves. The bottle restores 10-15 ppm with a 5 ml dose per 100 litres. SGD 15-22 for 250 ml. Again, diagnostic — most tanks do not need it.
Dosing Schedule in Singapore Tanks
A simple ProScape regime in a 60 cm planted tank: NPK Monday and Thursday, Fe Tuesday Friday Sunday. Total monthly bottle consumption at this rate is roughly 100 ml NPK and 60 ml Fe — meaning a single 250 ml NPK bottle lasts about 75 days. That works out to an effective monthly fertiliser cost of roughly SGD 12-15, which is solidly mid-tier in the local scene.
Compatibility, Pros and Cons
JBL ProScape works well with Asian volcanic clay substrates from the substrate category. Macros do not push pH or KH meaningfully. With ADA Amazonia in the first month, skip NPK entirely — the soil’s nutrient release is sufficient and adding NPK spikes algae. Pros: split-bottle flexibility, affordable per-ml cost, German batch consistency, clear documentation. Cons: verbose bottle labelling, cap nozzles drip if unwiped, Fe bottle separates after 4-6 months and needs shaking.
ProScape vs Tropica vs Seachem
Tropica Premium is a single-bottle solution dumping macros, micros and trace together. ProScape’s split is more flexible but Tropica’s simplicity wins for beginners. For tanks under 60 litres, Tropica often wins; for 90+ litres with CO2, ProScape is the better long-term choice. Seachem’s Flourish line is similarly split into per-element bottles for granular control but needs five to seven bottles on the shelf. ProScape’s four-bottle approach is the practical middle ground.
Where to Buy and Who Should Pick It
Gensou stocks the full ProScape line at 5 Everton Park. C328 Clementi and Polyart carry NPK and Fe consistently. Iwarna carries the line on rotation. Lazada listings from JBL’s authorised distributor are legitimate; check the holographic JBL sticker on the cap. Hobbyists running 60-120 cm planted tanks with CO2 and decent lighting from the aquarium equipment range benefit most. Beginners with low-light tanks should start with Tropica Premium. Heavy stem-tank specialists may step up to a full Seachem split.
Related Reading
emilynakatani
Still Have Questions About Your Tank?
Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
