Seachem

Seachem Laboratories PhosNet

Please make a selection


Similar Products


PhosNet™ is a granular ferric oxide (GFO) with high porosity, high surface area and high binding capacity. It will rapidly remove phosphates and silicates from both freshwater and saltwater and will not release them back into your aquarium. It exhibits stronger binding than most competing products and consequently can reduce phosphates and silicates to very low levels. PhosNet™ also offers less dust and thus is easier to use than most competing GFO products.

Comparing Seachem Phosphate Removers
PO4 bound (mg/g)
PhosGuard (Alumina Oxide) 0.87
PhosBond (GFO and Alumina Oxide hybrid) 1.19
PhosNet (GFO) 1.41
Directions
or best results, PhosNet 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 50 g (½ cup) for every 200 L (50 US gallons) saltwater or 400 L (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 PhosNet™, 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. PhosNet™ 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.

Reef Chemistry Calculator

Use our chemistry calculator to find out how much you need to add to your aquarium.


Manufacturer Info

Seachem
Seachem Laboratories, Inc. was established in 1980 by Dr. Leo G. Morin. Seachem moved into a state of the art 110,000 square foot facility in Madison, Georgia marking their 25th anniversary in the industry in 2005. This facility includes production and research laboratories, manufacturing, inventory, shipping, and office space.

Ask a Question Earn 15 Points when you answer a question
Sort By :
 
9 Questions
Displaying questions 1-9
 
Q
How would I use this to treat a 28 gal. tank? This says its rated for 50 gal.
Asked : Mar 22, 2018
By : Patrick Schieffer, Houston
 
 
 
A
This is enough to treat 50 gallons, for your tank volume you could reduce the quantity by half.
Answered : Mar 26, 2018
By : Kat
 
Q
How does PhosNet compare in efficiency and cost to GFO?
I have been having trouble with phosphate in my reef setup. I tried putting regular GFO in a filter bag and placing it in my sump but I was not please with the results. I read that GFO needs to tumble to increase effectiveness so I set it up in a reactor but it produces too much dust. I read that high capacity GFO produces less dust but it is very expensive. I am curious is PhosNet is a better and more cost effective alternative to expensive GFO.
Asked : Jan 13, 2017
By : Greg, Virginia
 
 
 
A
PhosNet is GFO. SeaChem utilize a very high quality and clean GFO, so it is one of the better GFO's available. The higher quality also translates to a higher cost.
Answered : Jan 13, 2017
By : MD Tech
 
 
Sort by:
 

Overall, others give this:

  • 5.0

1 Reviewers (100%) would recommend this

Overall Rating:

download image
5  Star
 1
4  Star
 0
3  Star
 0
2  Star
 0
1  Star
 0
 
5
5.0
Seachem

reviewerbadge
PROS
Clear, gorgeous tank
CONS
Pricey
REVIEW
I'm a devoted Seachem user for all my filtration and addative needs.
This is amazing in a reactor. No alternative I've tried comes close to how well it works.
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
Write Your Review Earn 15 Points when you write a review
Sort by:
 

Overall, others give this:

  • 5.0

1 Reviewers (100%) would recommend this

Overall Rating:

download image
5  Star
 1
4  Star
 0
3  Star
 0
2  Star
 0
1  Star
 0
 

Free, Fast, and Flexible Shipping Options

  • $2.99 flat rate shipping for orders under $29

    Most orders under $29 ship for only $2.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in 1-7 business days after it ships out.

  • free shipping for orders $29+

    We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 1-7 business days. Just spend $29 or more!

  • free faster shipping for orders $250+

    Over 90% of shoppers receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $2.99—or spend $250 and we’ll upgrade you automatically!

  • need your order even faster? no problem!

    Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.

  • buy it today and we'll ship it today

    Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.

  • live plants, live foods, and frozen foods delivered to your door

    We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!

Learn More About Shipping

60-Day Return Period with Easy Online Returns

Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.

A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.

We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.

Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.

Learn More About Returns

Earn 5% Cash Back for Most Purchases

Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!

  • Earn 5 reward points for every $1 you spend to get 5% cash back
    Most Products
  • Earn 1 reward point for every $1 you spend to get 1% cash back
    Abyzz, American Marine, AquaIllumination, AutoAqua, CoralVue, Digital Aquatics, EcoTech Marine, Giesemann, GHL, Hanna Instruments, Hydor, IceCap, Innovative Marine, Iwaki, Kamoer, Kessil, Klir, Korallen-Zucht, Maxspect, Mur-lok, Nano Box, Neptune Systems, NYOS, Oceanbox Designs, Pax Bellum, Radium, Red Sea, Reef Glass, Reef Octopus, Seneye, Somatic, Tunze, Vertex Aquaristik, and Waterbox Aquariums

You can also get bonus reward points by purchasing select items during special sales and promotions.

Learn More About Rewards

Frequently Bought Together