Delivery throughout the EU

MasterLine FilterMAX 1000 ml – Biological Filter Media

Trusted by 500+ aquascapers

€18,40
  • Clearer, more stable water week after week
  • 1 litre treats up to 100 litres
  • 100% natural and reusable indefinitely
  • 6-12 mm grains fit canister, HOB or sump
  • Boosts bacteria without choking flow

Biological filter media that gives nitrifying bacteria a huge porous surface to settle on, where they turn ammonia and nitrite into safer compounds. One litre covers up to 100 litres of tank water, and unlike ceramic rings it never needs replacing.

Fast delivery (1–5 days EU)

Carefully packed and protected

Tips from real aquascapers

Description

MasterLine FilterMAX is a 100% natural, reusable biological filter medium for freshwater and saltwater aquariums. One liter treats up to 100 liters of tank water, offering a large porous surface (6–12 mm grain size) where beneficial nitrifying bacteria colonize and break down toxic ammonia and nitrite into safer compounds.

What is MasterLine FilterMAX?

FilterMAX is a biological filter media designed to maximize the effective volume of any aquarium filter without restricting water flow. Unlike ceramic rings or bio-balls that need periodic replacement, FilterMAX is 100% natural and reusable indefinitely when cared for properly.

Key Benefits

  • Supports nitrifying bacteria that break down ammonia and nitrite
  • 100% natural filter material — never needs replacing
  • Works in both freshwater and saltwater aquariums
  • 6–12 mm grain size fits any filter system (canister, HOB, sump, internal)
  • Maximizes usable filter volume without blocking water flow
  • Beneficial bacteria survive filter cleaning, protecting your cycle

Specifications

Volume 1000 ml (1 liter)
Coverage Up to 100 liters of aquarium water
Grain size 6–12 mm
Water type Freshwater and saltwater
Reusable Yes, indefinitely
Brand MasterLine

How to Use

  1. Rinse FilterMAX thoroughly with water before first use to remove fine dust.
  2. Place it in your filter immediately after the mechanical filtration stage for best results.
  3. For faster cycling, squeeze an already-colonized sponge into the tank and let the filter absorb the bacteria.
  4. Clean the external filter every 3–6 months to keep it running efficiently.

Frequently Asked Questions

How much FilterMAX do I need for my aquarium?

One liter of FilterMAX is enough for a 100-liter aquarium. For larger tanks, scale proportionally (e.g., 2 liters for 200 liters).

Can I use FilterMAX in a saltwater tank?

Yes. FilterMAX works equally well in freshwater and saltwater aquariums.

Does FilterMAX need to be replaced?

No. It's a 100% natural, reusable filter medium and can be used indefinitely if rinsed and maintained properly.

Where should I place FilterMAX in my filter?

Immediately after the mechanical filtration stage (sponge or filter floss), so it isn't clogged by debris.

Is it safe to turn off the filter for cleaning?

Avoid leaving the filter off for more than 5–6 hours, as this can cause the beneficial bacteria colony to die off.

MasterLine FilterMAX is the ideal biological filter media for maintaining stable, healthy water parameters in any freshwater or saltwater aquarium.

  • Professional support

    Expert help when you need it

  • Delivery throughout the EU

    Delivery to all EU countries

  • Secure payment

    Fast and secure payment options

  • Easy returns

    Лесно връщане и замяна
​

FAQ

What makes Aquarium Boutique different from mass-market stores?

We don't sell everything — we sell only carefully selected products, personally tested. Every item is chosen with a clear purpose: to work well and last long. You don't need to guess about quality — we've already done that for you.

Do you ship to my country?

Yes, we ship across all of Europe. For Bulgaria we work with BOX NOW and Speedy — fast and reliable home or locker delivery. For other EU countries we use international courier services.

How quickly will I receive my order?

For orders within Bulgaria, we typically deliver within 1–3 business days. For other EU countries — usually 3–7 business days depending on location.

Can I return a product if I'm not satisfied?

Yes. If something doesn't meet your expectations — contact us. We have a clear and fair return policy. Your satisfaction matters to us and we will find a solution.

Do you offer advice on product selection?

Absolutely. Our team keeps aquariums and knows the products personally. Write to us — we'll help you choose the right solution for your tank, budget and experience level.

Are your products tested and approved?

Yes. Every product in our store has gone through our personal selection and testing process . We only work with trusted brands and don't list products we don't believe in.

What payment methods do you accept?

We accept all major payment methods — credit and debit cards, PayPal, and cash on delivery for Bulgaria. All payments are secure and encrypted.

How can I track my order?

After your order ships, you'll receive an email with a tracking link. You can follow the status in real time directly through the courier's website.