Out of Stock No Longer Available Seachem PhosGuard Phosphate & Silicate Remover in Marine & Freshwater Aquariums, slide 1 of 1

Seachem PhosGuard Phosphate & Silicate Remover in Marine & Freshwater Aquariums

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Description

Seachem PhosGuard Phosphate & Silicate Remover in Marine & Freshwater Aquariums rapidly removes phosphate and silicate from marine and freshwater aquariums. It is not recommended for phosphate buffered freshwater. PhosGuard is highly porous for high capacity and bead-shaped for optimum hydrodynamics.

Key Benefits
  • Rapidly removes phosphate and silicate from marine and freshwater aquaria. 
  • Bead shaped for optimal hydrodynamics. The shape allows for maximum water flow through media.
  • Phosphate plays a major role in the chemistry of the aquarium, and an overdose of PhosGuard is capable of very rapidly lowering the phosphate concentration in the aquarium.
  • Convenient resealable packaging that allows for easy storage.
  • Not recommended for phosphate buffered freshwater.
Precautions

HAZARDS TO HUMANS: For aquarium use only. Keep out of reach of children.

Special Note

  • 2.1-oz bag treats up to 60 gallons.
  • 10.6-oz jar treats up to 300 gallons.

See all items by Seachem

  • Item Number
    103696
  • Aquarium Type
    Freshwater, Saltwater
  • Fish Type
    Tropical Freshwater, Marine Fish
Instructions

May generate heat on initial contact with water. Pre-wet by adding to a double volume of freshwater, followed by a rinse. For best results, PhosGuard™ should be rinsed before use and placed so as to maximize the flow of water through it but not so that it tumbles against itself in flow. It may be used in a canister filter, media chamber, box filter, or any high flow area of a trickle filter. Use of a filter bag is recommended. Use 1/3 cup for every 50 US gallons saltwater or 100 US gallons freshwater.

Leave product in place for 4 days, then test phosphate or silicate concentrations with either MultiTest™: Phosphate or MultiTest™: Silicate. If the concentration of the component you are trying to decrease has not dropped to around 0.02 mg/L, then replace the PhosGuard™, otherwise leave in place until levels begin to climb again. As long as concentrations remain under control, the product is not exhausted. Over treating is not recommended. PhosGuard™ is not an exchange resin and does not release anything into the water. It does not leach phosphate or silicate back into the water and may be removed, dried, and returned to service until exhausted. Continuous use of small quantities is better than intermittent use of larger quantities.

FAQ

How do I use PhosGuard? How long does it work and when is it exhausted?

PhosGuard is best used in smaller quantities and changed frequently. In an environment with an excessively high phosphate reading, PhosGuard will exhaust rapidly (4 – 5 days). Place the product in a high flow rate area and test your phosphate levels, changing as needed. When you see that your level is below 0.2 ppm (mg/L) leave that portion of PhosGuard in the filter. PhosGuard may yellow somewhat as it picks up organics, but that is not an indicator of exhaustion for phosphate removal. Continue to test weekly for phosphate until you see it begin to rise again. You will then know that it is time to change the PhosGuard. If you have low levels of phosphate the PhosGuard will absorb the silicate in your system. It’s inert and safe to leave in your filter.

Is PhosGuard regenerable?

Although some manufacturer’s claim that their aluminum oxide based phosphate removing products can be regenerated by intense heat, this is, unfortunately, not the case. That claim is based on a naive interpretation of the information provided by manufacturers of bulk aluminum oxide. Aluminum oxide is more commonly used in gas purification to remove volatile organics and moisture; heating the material after such use will release the non-covalently adsorbed compounds. However, heat cannot result in phosphate release from aluminum oxide due to a difference in the nature by which phosphates are bound to aluminum oxide versus adsorbed gases.

If PhosGuard doesn’t release aluminum that will stress corals, then why did my corals close a day after I added PhosGuard?

Phosphate plays a major role in the chemistry of the aquarium, and an overdose of PhosGuard is capable of very rapidly lowering the phosphate concentration in the aquarium. If an overdose of PhosGuard is used, it is possibly to lower the phosphate concentration so quickly that corals become stressed.

Can I use PhosGuard in a media reactor?

We do not recommend it, as the tumbling action of a media reactor can cause this media to produce dust.

Rating: 4.0 of 5 stars 6 Reviews 6 Reviews 4 out of 5 Stars

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67% Recommend

67% of reviewersrecommend this product

Rating: 4.0 of 5 stars 4 / 5

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6 Reviews

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  • 5 out of 5 stars

    Lowered phosphate

    By jazzpr1 on Jul 14, 2019

    I use this in my reactor and it does a good job lowering phosphates

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  • 5 out of 5 stars

    It really worked!

    By DKLL on Apr 23, 2019

    Easy to use and it cleared up the water. Make sure you have some sort of filter bag for it.

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  • 2 out of 5 stars

    PhosGaurd not working

    By Notworking on Aug 28, 2018

    My phosphate levels must be too high for PhosGaurd.

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  • 2 out of 5 stars

    There are better alternatives

    By BobG on Feb 12, 2018

    This review is not about Chewy's service which is outstanding. Seachem's PhosGuard is very inconvenient to use and at the recommended dose it did nothing to reduce the phosphate level in my aquarium. At 3 times the recommended dose it did reduce the level after a full week. It does claim to not leech anything back into the aquarium and that is a good thing.

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  • 5 out of 5 stars

    Works like a charm

    By Mike on Sep 26, 2017

    I did a 4x dose to rapidly reduce the phosphate level in my reef tank two weeks later and my phosphates are currently at zero with a 20% water change, it definitely does what is says.

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  • 5 out of 5 stars

    PhosGuard Phosphate & Silicate Remover in Marine & Freshwater Aquariums

    By Poppy on Aug 26, 2017

    Best for PhosGuard Phosphate & Silicate Remover in Marine & Freshwater Aquariums online and fast shipping

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