Seachem PhosGuard 250ml: Removes Phosphates in Freshwater Aquariums

Racko: Le produits fait bien son travail. Par contre je viens de me rendre compte qu'il a pris une augmentation de de prix de 45% environ si je ne me trompe

France on Oct 17, 2023

森 昌.: 商品自体の効果には、満足しております。微量値を維持する為にこちらの商品を選びました。鉄系に比べて効果が弱いのは知っていた上での選択です。

この商品と一緒にマツダ社製のバイオネット ミニサイズ(荒目)を購入している方が多い様に表記してあったので私もマネして購入しました。
ただ、事前に調べなかった私が悪いのですが、小さめの粒だけ抜け落ちます。。
結局マツダ社製のバイオネット(細目)に買い替えて使用しております。

Japan on Sep 18, 2023

Celeste37: I have a 20 gallon long aquarium and was baffled by why a scum was developing on the surface in spite of good filtration. I added a wave maker and that helped - but still - the scum was always lurking.
Finally - I tried this and that solved the problem. I put about a tablespoon in a little net bag and put the bag in the filter. RINSE the phosguard baggie before putting in the tank. Else you may get a white cloud - seems to be harmless to the fish though.

United States on Aug 26, 2023

FalconFalcon: All sand tanks .... diatom (brown algae) outbreak in all 3 after moving house.

2 treated with Phosguard .... one treated with fluval pads (which are rubbish)

Can you see the difference? (Look at the sand)

United Kingdom on Aug 26, 2023

Rick889764: I only received this product last week of this review request. It rinsed off residue quickly. Seems like water flow through the reactor canister is freely. So far, I accept the results in its action, but need couple weeks more w/water testing.

United States on Jul 06, 2023

ferdinando cogo: Ottimo per eliminare i fosfati in acquario

Italy on Apr 07, 2023

JIM CUMMINS: This product was well packaged and delivered earlier than expected, it's great at helping to control the phosphates in my reef tank

United Kingdom on Apr 02, 2023

Michael F.: Product works! however this is my fault, but I wanted to warn fellow fish keepers. I was noticing a small amount of hair algae in my reef tank. So I decided to add phosguard in a mesh pouch and add it to my refugium. I didn't measure it thinking it didn't matter. I just poured 1cup of it into the mesh bag. Well we ran some errands and when i came back within 2 hours time all the fish were laying at the bottom and gasping for air. I put them all in a hospital tank and they all survived. I did a 30% water change and everything is back to normal. So be careful.

United States on Feb 24, 2023

Mr Yoda: I have 29 gallon tank, with 7 or so Amazon Sword plants, gravel substrate and tap water (with Prime conditioner to remove Chlorine). The tank is not over stocked. There is about 20 inches of total fish in there between some mollies, guppies and platies.

After cleaning the walls and substrate, every 4th day or so brown algae was visible all over the tank.

I read online and a slew of things came up for the cause of brown algae -
1. New Aquarium - My Aquarium has been fully cycled for a few months so I skipped this.
2. High Nitrates - I measured this and it was constantly around 20-30 and I would like to keep it that way for plants. I know changing water is important but I would like to do it every 2-4 weeks and not ever 4th day which is crazy! It wasn't around 80-100 nitrates so I didn't want to do anything here.
3. High Light - My light is only on 6-7 hours a day and that is needed for plants so I didn't want to change anything there.
4. High Silicates - I didn't have a Silicate test kit and didn't want to buy one. Neither did I want to change to RO or store bought water. I don't have sand substrate which some sites claimed to be the cause of silicates....

United States on Sep 01, 2017

nysnowbird92: This will be an updated review as I just got the product last night. I have a 20 gallon tank and have been frustrated with how quickly algae seems to be growing on my 'fake' plants in the tank.. I have an algae eater but he can't get all the leaves due to their shape and size. Having phosphate test kit for the pool I decided to check the fish tank. The high mark is dark blue. I've never seen the test water such a dark blue color and I have problems with the pool in the summer due to trees overhead and the Florida climate. My fish tank water had even more phosphates than the pool ever had. So I bought this product after seeing a video on its use. I have an AquaClear 30 filter which uses the foam, purigen, biomedia stages. I took out the biomedia bag and put it beneath the intake and replaced it with the same sized bag filled with PhosGuard. It was roughly half the 250ml container I purchased here. I put it in last night around 6pm (after rinsing it well as directed) and left it. I tested the water today around 3pm and the test water was almost clear, indicating little to no phosphates in the water. It was still a little blue but nowhere near the dark blue prior to using the...

United States on Dec 24, 2014