MasterLine Root Caps

capsules with slow release micro and macronutrients
for a healthier root system and fewer deficiencies

brings nutrient depleted soils back to life
product for plants with a high degree of difficulty
safe for all forms of life in the aquarium

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All in One formulas

Modern fertilizers, that contain all the micro and macronutrients necessary for a healthy growth. One bottle, an easy dosage system, a minimal investment

MasterLine Carbo

complementary source of organic carbon
for daily dosing only
healthier plants with less algae

easy absorbable by the plants
safe for all forms of life in the aquarium
contains a graduated measuring cup from 2.5 to 20 ml

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Awesome People Use MasterLine

Aquarists all over the world are using MasterLine with great success

Karthick J

This amazing MasterLine fertilizer is a game changer for my plants. Loving the combination of using All In One Lean and Carbo in my tanks and no more algae in sight.

Adrian Nicolae

I have been using MasterLine for many years and am very satisfied. As long as you follow the dosing instructions, everything goes by itself. The plants love the product and they thank you with their beautiful growth.

Pavol Kulanda

Paint your canvas with MasterLine! A fantastic range of products that suit all levels of enthusiasts, whether you like it simple or to have complete control. Does exactly what it says!

Laura Dan

The plants are an important part of every scape. I rely on the MasterLine range to provide color and good growth. This is the only way I can provide shape, textures, and especially naturalness, to an aquascape.

Liquid Nature

Fertilizers have always been a hot topic in aquaristics. Thanks to MasterLine, it has now become much easier to supply your aquarium perfectly, giving you more time to focus on aquascaping and livestock .

Robert Simo

Why do I recommend MasterLine products? It's simple:
1. Easy to use
2. Suitable for beginners or professionals
3. Your plants will grow healthy
4. Unbeatable performance / price ratio

Florian Breindl

Masterline I, II and Carbo is my favorite fertilizer formula. It provides all the nutrients my aquatic plants need. It's easy to use and has several dosing options. I can use it for strong and fast growth or even for slow growing plants. The color of my aquatic plants is remarkable.

Flaviu Zapartan

MasterLine is not just a brand, it's a concept that is always improving, progressing, diversifying, seeking to understand the needs of the aquarist and to meet these needs with an exceptional product at an affordable price. I recommend it to all aquarists no matter what level they are at.

Kevin Hoehlein

I have tried many fertilizer systems and many worked well. However, I was never completely satisfied with the densely planted aquariums and the demanding plants. MasterLine made possible what other fertilizers could not.

Emilia Mija

MasterLine is the fertilizer used in our family for over 4 years. It gives us the joy of growing beautiful and healthy plants from those with easy requirements to those with a high degree of difficulty, without problems. It's an easy fertilizer system to be used by both beginners and experienced aquarists.

Luis Cardoso

MasterLine has state-of-the-art products to take care of your plants. I like AIOs because they are a very simple and efficient way of fertilizing, which offers very good results. It's my daily method of fertilizing all my aquariums.

Frequently Asked Questions

It all depends on the fertilizing formula. For All In One Soil, All In One Golden and Carbo, to benefit entirely of the elements inside, it's best if you dose them during the lighting period (5-10 minutes before or shortly after the lights turn ON).

For MasterLine I, II and All In One, it doesn't matter. In fact, these can even be dosed weekly.
Aquariums that have a clean filter and substrate can do very well with 30% water change weekly. However, aquariums that have a dirty filter and/or substrate, doing 50% water change weekly is better.

By doing larger water changes, you remove the dirty water that contains dissolved organics which can create biofilm, the growth medium for some algae types.
My personal favorite is having a continuous lighting period. This helps the plants to continue the photosynthesis process and keep the oxygen levels high.

The pearling effect is improved and the plants use their energy more efficiently. having a break, has no effect on the algae development.
You should never neglect your filter, no matter the volume of filter media that it holds. Once every 2 months, is a good time to clean the filter, the hoses, the adaptors, the rotor and all the accessories that the water passes thru.

This will help in keeping the water cleaner (less particles in the water column) and less problems with the algae.
When the substrate gets too dirty, it can suffocate the plant's roots. It can also melt the older parts of the plants. It can cause cyanobacteria GSA and GDA. It's a good practice to vacuum the substrate every 3-4 months and when it gets too dirty.

By using a vacuum cleaner, you should insert it 3-4 cm in the substrate, if for example the thickness is 5 cm, and siphon the dirt out of the substrate.
I would recommend at least 30 ppm CO2. You can increase slowly to 40-50 ppm depending on the light intensity and plant types in your aquarium. The best way to determine the CO2 concentration is by using a drop checker.

The color of the liquid inside it should be green for around 30 ppm CO2 and lime green for 40-50 ppm. Try not to go on the yellow or blue side. Green to blue color means not enough CO2 while yellow means too much.

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