MasterLine GH Plus product container on a white background

MasterLine GH Plus

4.7(26)reviews
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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 GH Plus — Precision RO Water Remineralizer

Achieve the exact water parameters your aquascape demands. MasterLine GH Plus is a 100% soluble salt mixture engineered to raise General Hardness (GH) in reverse osmosis or soft water — without touching your KH or pH.

Key Features

  • Raises GH precisely — dial in the exact hardness your plants and fish require
  • 100% soluble — dissolves completely with no residue
  • Ideal for RO water — perfect for remineralising purified or soft water sources
  • 250g — concentrated formula goes a long way

Whether you're keeping soft-water species or maintaining a precision planted tank, MasterLine GH Plus gives you the control to create the perfect aquatic environment.

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: 20 (77%)
  • 4 stars: 3 (12%)
  • 3 stars: 3 (12%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
Mia Sharp
Good stuff

Does what it claims and helps keep my parameters in check. Recommend.

C
Cooper Ward
Perfect

Small dose makes a real difference. My go to for this now.

C
Cooper Ross
Does the job

Use it as directed and it's made a real difference to my water stability. Easy to dose and effective.

I
Isla Wilson
Reliable additive

Consistent results and gentle on the tank. Will repurchase.

C
Cooper Walker
Excellent

Conditions the water nicely and the results are clear. Great buy.

S
Spencer Lambert
Works well

Easy to use and effective. Noticed an improvement quickly.

S
Spencer Chapman
Value for money

The concentration makes this great value. Works a treat.

S
Shane White
Reliable

Consistent results and easy to dose. Part of my routine now.

S
Spencer Ellis
Highly recommend

Helped stabilise my tank and the plants and fish are happier for it.

T
Tracey Young
Solid choice

Does the job every time without fuss. Lasts ages.

M
Mason Barrett
Easy to use

Clear dosing instructions and works as described. Happy with it.

C
Caitlin Lee
Does what it says

Effective and easy to dose. No complaints at all.

M
Mikayla Byrne
Good value

Concentrated so a bottle lasts a long time. Great price for the quality.

A
Aaron Ellis
Happy with it

Easy to use and effective. Lasts a long time too.

T
Toby Price
Great buy

Concentrated, effective and good value. Highly recommend.

L
Layla Patel
Essential

A useful addition to my dosing routine. Does exactly what it should.

J
Joel Hayes
Top product

Best in its category I've used. A little treats a lot.

J
James Evans
No fuss

Just works. Easy to dose and keeps things stable.

M
Marcus Baker
Works perfectly

Fast acting and economical. My tank is more stable for it.

C
Charli Coleman
Trusted

Use it across my tanks. Consistent and reliable every time.

M
Mason Baker
Great for stability

Keeps my parameters where I want them. A must have for my setup.

J
Jarrod Dixon
My go to

Switched to this and won't go back. Effective and economical.

K
Kylie Roberts
Concentrated and effective

Only need a small amount. Lasts ages and works perfectly.

K
Kate Pearce
Very pleased

Effective and economical. Tank is healthier for it.

D
Demi Sharp
Great addition

Improved my water parameters noticeably. Quality product.

T
Tara Saunders
Recommend

Effective, concentrated and great value.