Price loading...

ARKA Silicate remover aquarium – ARKA Sili-Out 2 5000 ml – eliminates silicate, phosphate & yellowing compounds – stabilises water parameters without pH drop – for marine & freshwater tanks – filter bag

Multicolored, SIO25

Price data last checked 102 day(s) ago - refreshing...

View at Amazon

Price History & Forecast

No Price Data Available

Price history will appear here once data is collected from Amazon.

Price Distribution

No price data available for histogram

Description

Product Description Sili-Out 2 removes silicate, phosphate, barium, arsenic, chromium and yellow substances from the water quickly, safely and permanently and improves the water quality in the long term. Sili-Out 2 enables a targeted reduction of the above-mentioned pollutants in a form that is harmless to your animals, without affecting the pH value. Sili-Out 2 improves the natural growth of corals and plants with pollutant problems within a very short time. The growth of unwanted diatoms is permanently prevented. Sili-Out 2 is an aluminium-based product with a purity level of 99 + %. Directions Please note the instructions on the product.

Key Features

Powerful silicate & phosphate control – high-purity aluminium oxide adsorbs problem substances within hours – combats diatoms & yellow tinge – ideal for marine, freshwater & nano tanks – no pH fluctuations.

Broad-spectrum contaminant removal – binds silicate, phosphate, arsenic, barium, chromium & more – protects from nutrient overload – perfect for reef, planted or high-load fish-only systems.

Safe & aquarium-friendly – 99% pure aluminium granules in fish-safe formulation – no pH impact, no metal leaching – suitable for delicate corals, shrimp, discus & breeding tanks.

Easy dosage & use – start with 50 ml per 100 l water (up to 100 ml for heavy loads) – replace once silicate or phosphate rises again – includes fine mesh filter bag – works in canisters, sumps & reactors.

Trusted ARKA quality – refined grain, low-dust & consistently effective – proven by breeders & reefkeepers – ideal in combination with myAQUA RO systems & Resin-Pure post-filters for top-tier water quality.

Product Specifications

Brand
ARKA
Model
SIO25
Colour
Multicolored
Size
3500g
Format
Target
Domain
Amazon UK
Listed Since
05 January 2023

Barcode

No barcode data available

Similar Products You Might Like

ARKA - POND Sili-Out 2 - silicate remover (13.7 kg.)
98% match

ARKA - POND Sili-Out 2 - silicate remover (13.7 kg.)

ARKA

£107.38 06 Feb 2026
Phosphate Remover Aquarium – ARKA Phos-Out 4 Granules 5000 ml – removes phosphate, silicate & tannins – iron hydroxide media for freshwater & marine tanks – with filter bag – pH neutral & residue-free
95% match

Phosphate Remover Aquarium – ARKA Phos-Out 4 Granules 5000 ml – removes phosphate, silicate & tannins – iron hydroxide media for freshwater & marine tanks – with filter bag – pH neutral & residue-free

ARKA

£42.24 12 Jan 2026
Phosphate Remover Aquarium – ARKA Phos-Out 4 Granules 20 l – removes phosphate, silicate & tannins – iron hydroxide media for freshwater & marine tanks – with filter bag – pH neutral & residue-free
95% match

Phosphate Remover Aquarium – ARKA Phos-Out 4 Granules 20 l – removes phosphate, silicate & tannins – iron hydroxide media for freshwater & marine tanks – with filter bag – pH neutral & residue-free

ARKA

£117.67 19 Feb 2026
Phosphate Remover for Aquariums – ARKA Phos-Out 4 5000 ml – liquid PO4 remover for freshwater & marine tanks – rapid action, lanthanum-free – prevents algae & stabilises water quality
94% match

Phosphate Remover for Aquariums – ARKA Phos-Out 4 5000 ml – liquid PO4 remover for freshwater & marine tanks – rapid action, lanthanum-free – prevents algae & stabilises water quality

ARKA

£60.01 07 Jan 2026
Nitrate & Phosphate Remover Aquarium – ARKA NOPO Control 5000 ml – biologically reduces NO3 & PO4 via bacteria activation – for clear water & stable parameters – reef-safe for freshwater & marine
94% match

Nitrate & Phosphate Remover Aquarium – ARKA NOPO Control 5000 ml – biologically reduces NO3 & PO4 via bacteria activation – for clear water & stable parameters – reef-safe for freshwater & marine

ARKA

£56.52 11 Jan 2026
Aquarium substrate cleaner – ARKA Substrate Cleaner 5000 ml – removes sludge & detritus from gravel & substrate – 100% biological with live bacteria – no siphon or hose – for freshwater & marine tanks
93% match

Aquarium substrate cleaner – ARKA Substrate Cleaner 5000 ml – removes sludge & detritus from gravel & substrate – 100% biological with live bacteria – no siphon or hose – for freshwater & marine tanks

ARKA

£75.09 22 Feb 2026
Starter bacteria aquarium 5000 ml – safe start for large aquariums – stabilises water after cleaning & water changes – reduces ammonia & nitrite biologically – ARKA Nite-Out II
93% match

Starter bacteria aquarium 5000 ml – safe start for large aquariums – stabilises water after cleaning & water changes – reduces ammonia & nitrite biologically – ARKA Nite-Out II

ARKA

£62.93 18 Feb 2026
ARKA - Zeopure Powder Zeolit w proszku 50 mikronów) (11,5kg)
93% match

ARKA - Zeopure Powder Zeolit w proszku 50 mikronów) (11,5kg)

ARKA

£47.79 24 Jan 2026
ARKA - Zeopure Zeolite (Zeolite 5-9mm) (14 kg)
93% match

ARKA - Zeopure Zeolite (Zeolite 5-9mm) (14 kg)

ARKA

£41.54 28 Jan 2026
Mixed bed resin aquarium – ARKA Resin-Pure 25 l – DI resin for RO systems – removes 100% TDS, silicate, nitrate & phosphate – ultra-pure water for reef & freshwater tanks – ion exchange media
93% match

Mixed bed resin aquarium – ARKA Resin-Pure 25 l – DI resin for RO systems – removes 100% TDS, silicate, nitrate & phosphate – ultra-pure water for reef & freshwater tanks – ion exchange media

ARKA

£164.80 11 Dec 2025
Aquarium water clarifier – ARKA Aqua-Pure 5000 ml – clears cloudy water & removes particles – 100% biological with filter bacteria – plant safe – for freshwater & marine tanks – for healthy water
93% match

Aquarium water clarifier – ARKA Aqua-Pure 5000 ml – clears cloudy water & removes particles – 100% biological with filter bacteria – plant safe – for freshwater & marine tanks – for healthy water

ARKA

£52.83 19 Feb 2026
Mixed bed resin aquarium – ARKA Resin-Pure 20 l – DI resin for RO systems – removes 100% TDS, silicate, nitrate & phosphate – ultra-pure water for reef & freshwater tanks – ion exchange media
93% match

Mixed bed resin aquarium – ARKA Resin-Pure 20 l – DI resin for RO systems – removes 100% TDS, silicate, nitrate & phosphate – ultra-pure water for reef & freshwater tanks – ion exchange media

ARKA

£130.72 21 Jan 2026
Nitrate remover aquarium – ARKA Aqua Balance 5000 ml – biologically reduces nitrate, algae & water cloudiness – supports stable water quality & fish health – for freshwater & marine tanks
92% match

Nitrate remover aquarium – ARKA Aqua Balance 5000 ml – biologically reduces nitrate, algae & water cloudiness – supports stable water quality & fish health – for freshwater & marine tanks

ARKA

£50.55 24 Jan 2026
ARKA - Pond Phos-Out 4-5 L - Effective liquid phosphate remover for ponds, improves water quality without the use of lanthanum.
92% match

ARKA - Pond Phos-Out 4-5 L - Effective liquid phosphate remover for ponds, improves water quality without the use of lanthanum.

ARKA

£64.21 19 Feb 2026
Reef salt – ARKA Premium Reef Salt 20 kg – fast-dissolving marine salt for stable reef aquariums – boosts coral growth, colour & health – phosphate/nitrate-free – ideal for RO water & sensitive corals
92% match

Reef salt – ARKA Premium Reef Salt 20 kg – fast-dissolving marine salt for stable reef aquariums – boosts coral growth, colour & health – phosphate/nitrate-free – ideal for RO water & sensitive corals

ARKA

£65.05 08 Mar 2026
Aquarium activated carbon – ARKA Carbopure 20 L – removes cloudiness, medication residue & colourants – acid-washed & steam-activated – for freshwater & marine tanks – crystal clear water
92% match

Aquarium activated carbon – ARKA Carbopure 20 L – removes cloudiness, medication residue & colourants – acid-washed & steam-activated – for freshwater & marine tanks – crystal clear water

ARKA

£77.91 22 Jan 2026
Aquarium water conditioner 5000 ml – tap safe formulation for large aquariums – neutralises chlorine ammonia & nitrite – removes heavy metals & protects fish – ARKA Xtreme
92% match

Aquarium water conditioner 5000 ml – tap safe formulation for large aquariums – neutralises chlorine ammonia & nitrite – removes heavy metals & protects fish – ARKA Xtreme

ARKA

£55.53 06 Feb 2026
ARKA - POND Zeopure (5-9mm Zeolite) (14 kg.)
92% match

ARKA - POND Zeopure (5-9mm Zeolite) (14 kg.)

ARKA

£40.48 07 Mar 2026
Thread Algae Remover for Ponds – MICROBE-LIFT AlgAway Powder 5000g – eco-friendly algae control for garden ponds – prevents regrowth – treats up to 28,500 litres – safe for fish & plants
92% match

Thread Algae Remover for Ponds – MICROBE-LIFT AlgAway Powder 5000g – eco-friendly algae control for garden ponds – prevents regrowth – treats up to 28,500 litres – safe for fish & plants

ARKA

£64.90 01 Feb 2026
RO system aquarium – ARKA myAQUA 3800 – 3800 L/day industrial-grade osmosis filter – removes 99% of salts, nitrate & bacteria – smart LED alert – pro-level water purifier for reef, tanks & home – ARKA
92% match

RO system aquarium – ARKA myAQUA 3800 – 3800 L/day industrial-grade osmosis filter – removes 99% of salts, nitrate & bacteria – smart LED alert – pro-level water purifier for reef, tanks & home – ARKA

ARKA

£358.27 09 Mar 2026
Coral Supplement Reef Aquarium – ARKA All-In-One 5000ml – complete dosing with calcium, iodine, strontium & vitamins – over 70 nutrients for growth, colour & vitality – ideal for SPS, LPS & soft coral
92% match

Coral Supplement Reef Aquarium – ARKA All-In-One 5000ml – complete dosing with calcium, iodine, strontium & vitamins – over 70 nutrients for growth, colour & vitality – ideal for SPS, LPS & soft coral

ARKA

£79.90 12 Jan 2026
Reef salt – ARKA Premium Reef Salt 15 kg – fast-dissolving marine salt for stable reef aquariums – boosts coral growth, colour & health – phosphate/nitrate-free – ideal for RO water & sensitive corals
91% match

Reef salt – ARKA Premium Reef Salt 15 kg – fast-dissolving marine salt for stable reef aquariums – boosts coral growth, colour & health – phosphate/nitrate-free – ideal for RO water & sensitive corals

ARKA

£50.16 24 Jan 2026
RO system aquarium – ARKA myAQUA 380 – 380 L/day reverse osmosis unit – removes 99% of nitrates, salts & bacteria – water filter & softener for marine & freshwater tanks – complete household setup
91% match

RO system aquarium – ARKA myAQUA 380 – 380 L/day reverse osmosis unit – removes 99% of nitrates, salts & bacteria – water filter & softener for marine & freshwater tanks – complete household setup

ARKA

£54.17 13 Jan 2026
ARKA - Coralline - 5 L - Coralline Algae Booster to accelerate the growth and intensify the colours of coralline algae in every saltwater aquarium.
91% match

ARKA - Coralline - 5 L - Coralline Algae Booster to accelerate the growth and intensify the colours of coralline algae in every saltwater aquarium.

ARKA

Out of Stock 12 Jan 2026