🌍 Worldwide shipping · 30-day returns · Rated Excellent on Trustpilot ★★★★½
Price
$128.99
Mixed bed resin aquarium – ARKA Resin-Pure 5 l – DI resin for RO systems – removes 100% TDS, silicate, nitrate & phosphate – ultra-pure water for reef & freshwater tanks – ion exchange media — image 1
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Mixed bed resin aquarium – ARKA Resin-Pure 5 l – DI resin for RO systems – removes 100% TDS, silicate, nitrate & phosphate – ultra-pure water for reef & freshwater tanks – ion exchange media

$128.99

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Size: 4000g
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About this item
  • Premium mixed bed resin for aquariums – deionises RO water to 0 µS/cm – removes total dissolved solids (TDS), silicate, nitrate & organics – ensures crystal-clear, residue-free water in reef & freshwater tanks.
  • Ideal post-filter for RO systems – combines H⁺ and OH⁻ resin in 40/60 ratio – perfect for ultra-pure water in sensitive coral tanks, shrimp setups & planted aquascapes – supports top-tier water stability.
  • Achieves lab-grade purity – conductivity as low as ~0.1 µS/cm – suitable for discus, SPS, shrimp & nitrate-sensitive species – removes invisible residues from RO systems – optimised for professional aquatics.
  • Fits all standard resin cartridges – compatible with ARKA myAQUA Multi-Filter & other refillable DI canisters – easy to replace when TDS rises – visible via handheld TDS meters – reliable & economical.
  • Trusted ARKA biotechnology – manufactured to strict quality standards – delivers peak performance in saltwater & freshwater aquariums – proven choice for aquarists seeking maximum filtration control.
Product details
Brand
ARKA
Manufacturer
ARKA Biotechnologie GmbH
Colour
multicoloured
Size
4000g
Weight
3.01 kg
Model number
RPXL
Part number
RPXL
EAN
4260735740862

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
Excellent
4.5 average rating
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S
Sigalit
🇮🇱 · January 2026

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
🇦🇺 · November 2025

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 12 of 10 reviews

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