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Your cart is empty.4.6 out of 5 stars
Phosguard rapidly removes phosphate and silicate from marine and freshwater aquaria. It is not recommended for phosphate buffered freshwater. Phosguard is highly porous for high capacity and bead-shaped for optimum water flow. It outperforms all competing products.
José Luis Ledesma Cardona
Reviewed in Mexico on February 6, 2025
Excelente producto. Realmente baja los fosfatos en acuario marino
Tino Bruno
Reviewed in the United States on February 17, 2025
I’m absolutely thrilled with Seachem PhosGuard and here’s why I’m giving it a 5-star review:1. Excellent at Removing Phosphates: I’ve been dealing with high phosphate levels in my aquarium for a while, and Seachem PhosGuard has been a game-changer. After using it for just a few days, I noticed a significant reduction in algae growth, which was one of my main concerns. The product works efficiently at removing phosphates, improving water clarity, and maintaining the overall health of my tank.2. Easy to Use: The 100 mL bag is convenient and easy to place in the filter. It’s designed to be used in a filter bag, which makes it super simple to add to your system. I also appreciate that it’s not messy and doesn’t leave any residue in the tank once it’s in place.3. Safe for Aquatic Life: I love that Seachem PhosGuard is safe for my fish and plants. I’ve had no negative effects on the aquatic life in my tank after using it, which is a huge relief. It’s one of the reasons I trust Seachem products—they’ve always proven to be gentle on sensitive ecosystems.4. Fast-Acting Results: The results were quick! My water cleared up in just a few days after starting to use it. You can see the improvement in the clarity of the water and a reduction in algae build-up. If you have any phosphate-related issues in your tank, this product will definitely help.5. Long-Lasting: While the bag is small, it goes a long way! The 100 mL lasts quite a while, and you can reuse it for multiple cycles. This makes it a cost-effective solution for keeping phosphate levels in check.6. Great for Freshwater and Saltwater Tanks: I’ve used this in both my freshwater and saltwater aquariums with great success. Whether you’re managing a fish-only tank or a reef tank, this product works across the board.7. Reliable Brand: Seachem is a brand I’ve trusted for years, and this product lived up to the high standards I’ve come to expect from them. Their products are always effective and reliable, and PhosGuard is no exception.Final Thoughts: If you’re battling high phosphate levels in your aquarium, Seachem PhosGuard is a must-have. It’s effective, easy to use, and safe for both fish and plants. The results are noticeable quickly, and I’ll definitely be keeping this product stocked in my aquarium maintenance supplies!🌟 Highly recommend for anyone needing to reduce phosphates and improve water quality in their tank!
Leah Foster
Reviewed in the United States on January 22, 2025
I got this stuff after getting tired of battling diatoms in the tank for months! There is not a trace of them and it’s been one month so far!
ASM NY
Reviewed in the United States on July 5, 2024
I have a 7 1/2 gallon aquarium that was constantly having a 10.0 phosphate level on API's phosphate test kit. I'd read that Chemipure Blue and Chemipure Elite can remove phosphates, so I tried both of those. Unfortunately, those didn't work, as the phosphate level stayed at or near 10.0 for the most part.Then, I tried doing more frequent water changes, but that didn't help either. I came across this product and gave it a try. After 2 days, there was no change, but on the 7th day after adding this product, the phosphate level had been lowered to 0.0!I'd been having major problems with algae (due to the phosphates, no doubt), but since using this, I've gotten very minimal algae growth in the tank. Good product --- I wish I'd found it sooner.
Peter J. Glover
Reviewed in the United States on March 24, 2024
Like the product states it removes silicates from the water column. I recently set up a 33 gallon bow front for my wife using a mix of pool sand and natural colored gravel. Within a week I had brown (diatom) algae on the glass and the rocks and plants(artificial). After buying this product and dropping the enclosed mesh bag into the filter area of her tank the algae has disappeared, will continue to monitor for diatoms and may need a second or third bag to annihilate the silicates but for $5 a bag it won’t break the bank
natasha r.
Reviewed in the United States on February 1, 2023
I am absolutely blown away by this product. I had brown algae all over my tank and I knew it crucial that I get rid of it before it sucks all the oxygen out my tank and kill all babies. Truth be told I was super hesitant at first but dang this product worked like a charm. Just for reference I have a 20 gallon long and I used two bags. Day one I put one bag on top of my sponge filter and the other behind it as my inhabitants were very curious. Day two woke up that morning and I it was like a dream super clear and all the algae was gone. Day three still going strong but I’m going to have to get another one as the brown algae is still putting up a fight. Definitely recommend this product and will be getting again plus it’s cheaper than the pet-store I work at.
arjun
Reviewed in India on July 22, 2021
Original Seachem product. My water had a lot of phosphates and had diatom nightmare and this product reduced a very little bit. The best thing I recommend installing a UV filter will kill floating diatom to some extent and control it by doing more water changes.The seller is a good and genuine Seachem product
Arash
Reviewed in Spain on June 28, 2021
Eso es muy importante por aquarium
Kunde
Reviewed in Germany on October 19, 2019
Top!!!
Spacetrucker
Reviewed in Canada on August 7, 2018
Ive had problems with brown algae in my 75 gallon tank for ages,I came across a video of this product and thought i'd give it a try. Best move ever,controls the algae for weeks and when i see new algae i just put in a new pack and its gone. I would totally recommend this product to anyone with an algae problem
James Z.
Reviewed in the United States on December 20, 2014
This product works as described, and I recommend it to others.I was having a phosphates problem for a while in my salt water tank at work because some of my macro algae had broken down in a spot I couldn't reach and was decaying there. I also, unbeknownst to me for a while, had an reverse osmosis/de-ionization filter system that wasn't pulling all the phosphates out of my top-off water. Bottom line, I was able to get the problem in better control using PhosGuard. That's good because the excess phosphates were really feeding some hair algae that had sprung up in my tank.The one thing that you have to note about this product is that it really needs to be in a place where it gets good water circulation over the media. I haven't had much luck in applications where there isn't much flow going directly over the PhosGuard.Additionally, depending on the prices at the time of purchase, you may be able to save money by buying a bag for the PhosGuard and buying the larger quantities of PhosGuard. Once when I did the math, it was about the same price to just keep buying these 100 mL bags, but the next time I needed some it was cheaper to buy the bag and the larger bottle of PhosGuard. Apparently the price of these fluctuate a bit.Other than that, I recommend this to others trying to keep phosphates under control.
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