MasterLine II, white bottle with label on a white background
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In stock
$100.00 away from free WA delivery Free delivery over $100 in WA ($150 elsewhere in Australia).
Free pickup in KenwickOpen Tue to Sat, 12pm to 6pm

Complete the scape

Picked by our team to go with this.

SOS Aquascaping Glue From $15.00
Alternanthera Reineckii 'Rosanervig' $12.00
About this product

MasterLine II — Concentrated Macronutrient Formula

Built for high-demand planted tanks. MasterLine II delivers a concentrated blend of Nitrogen, Phosphorus, Potassium, and Magnesium — the four essential macronutrients for healthy, harmonious plant development in fast-growing, densely planted aquariums.

Key Features

  • N, P, K & Mg — complete macronutrient coverage in a single formula
  • High-demand formulation — designed for Dutch-style tanks and aquariums with dense planting and fast growth
  • Precision dosing — ideal for aquarists who dose macro and micro nutrients separately for full control
  • Promotes harmonious growth — balanced macros support even development across all plant species
  • 500ml — concentrated for long-lasting use

Pair with MasterLine I (micronutrients) for a complete two-part dosing system tailored to your aquascape's exact needs.

Delivery and returns

Free delivery over $100 in WA and $150 elsewhere in Australia. Free pickup from our Kenwick store, Tue to Sat, 12pm to 6pm.

Returns policy

  • 5 stars: 22 (85%)
  • 4 stars: 3 (12%)
  • 3 stars: 1 (4%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Brett Marsh
Effective

Clear improvement in plant vigour and colour. Will buy again.

P
Patrick Lambert
Great results fast

Saw a difference in under a week. Highly recommend for any planted setup.

M
Marcus Scott
Solid choice

Reliable results and a generous bottle. My planted tank is thriving.

W
Willow Hill
Value for money

Large bottle that lasts. Effective and easy to dose daily.

A
Aleisha Bell
Top fert

Does exactly what it promises.

S
Shane Phillips
Precise dosing

Love that I can target exactly what my tank needs with this range. Plants responding brilliantly.

I
Indi Cooper
Pleased

Easy to dose and my plants are responding well.

C
Craig Sharp
Strong growth

Had to trim twice as often since using this. Plants are clearly loving it.

D
Damien Lyons
Fantastic

My scape has filled in beautifully since using this.

S
Shane Parker
Happy with results

Easy to use and effective. My stems are growing noticeably faster.

B
Belinda Howard
Great fertiliser

Does the job nicely. No algae issues when dosed correctly.

E
Erin Cooper
Excellent

Plants greened up within days and growth has been strong ever since. Will repurchase.

A
Aleisha Cooper
Pro level

The Masterline system has taken my tank to the next level. Clean, healthy, vibrant growth.

C
Customer
Love it

Best fert range I've used so far.

T
Tegan Barrett
Easy to use

Simple dosing and good value. My plants are thriving and pearling more than ever.

A
Aiden Morgan
Does the trick

Healthy growth and no downsides. Good value too.

J
Josh Parker
Plants love it

Noticeable difference in growth within a couple of weeks. My stems are greener and fuller. Easy to dose with the cap measurements.

T
Tracey Gray
Recommend

Easy dosing, great growth, no algae.

C
Chloe Shaw
Quality fert

You can tell it's a premium product. My plants have never looked better since switching.

L
Levi Hughes
Great for planted tanks

Balanced nutrients that my plants clearly respond to. No algae problems when following the recommended dose.

C
Cameron Chapman
Lush growth

Within a fortnight my carpet started spreading properly. Clearly providing what my plants were missing.

Z
Zoe Wright
Vibrant plants

The colour and growth improvement has been impressive. Worth every cent.

M
Max Parker
Great improvement

Plants perked up quickly and are now growing well. Simple to add to my routine.

L
Lucas Reid
Works well

Solid all rounder fert.

B
Brayden Reed
Brilliant results

My aquascape has never looked healthier. New growth everywhere and the colours have really popped since I started using this.

C
Connor Gray
Noticeable difference

My previously struggling plants have bounced back. Greener, fuller and growing fast.