

💎 Elevate your aquarium game with the ultimate phosphate remover!
HC GFO is a high-capacity, ultra-pure virgin granular ferric oxide phosphate remover designed to reduce phosphates up to 4 times more effectively than standard options. Ideal for high-end marine and freshwater aquariums, reef tanks, ponds, and pools, it ensures cleaner, healthier aquatic environments. Manufactured in Germany by LANXESS, it meets rigorous quality and purity standards and is compatible with various filtration systems.












| ASIN | B06WVHL4W3 |
| ASIN | B06WVHL4W3 |
| Best Sellers Rank | #50,939 in Pet Supplies ( See Top 100 in Pet Supplies ) #894 in Aquarium Filter Accessories |
| Brand Name | Kolar Labs |
| Customer Reviews | 4.7 4.7 out of 5 stars (168) |
| Date First Available | February 20, 2017 |
| Date First Available | February 20, 2017 |
| Directions | Rinse the GFO HC before use. Add 1 gram per gallon to your aquarium, pond, or reactor. Adjust the amount based on phosphate levels. Works well in reactors, filters, socks, and cartridges. |
| Is Discontinued By Manufacturer | No |
| Item Package Dimensions L x W x H | 5.39 x 3.74 x 3.66 inches |
| Item Weight | 700 Grams |
| Item model number | 9888185 |
| Item model number | 9888185 |
| Manufacturer | Kolar Labs |
| Manufacturer | Kolar Labs |
| Package Dimensions | 5.39 x 3.74 x 3.66 inches; 1.54 Pounds |
| Size | 700g |
| Target Audience Keyword | fish |
L**S
Great Product
Great Product
S**8
Keeps phosphate down better.
I was using the regular GFO from this brand and from an aquarium website. My phosphate was only going down to about .35 and then would creep up. I started using this one and finally my phosphates are .05! My reef tank has never had phosphates in check until now.
D**O
Reef success
Absolutely rocks at keeping phosphates down in my 1300 gallon reef system! Running a bunch of Tangs in a 120L x 48”W x 36”H with a 300 gallon sump. Absolutely recommend this product to anyone wanting to Reef hard!
I**Y
Good grain size. Minimal dust.
Container was filled correctly (as compared to the reviews/complaints with the 2 little fishy's GFO). Grain size is good. Rinsed with RO/DI water in a mesh bag a few times to get the dust out. Initial dose is 1 gram per gallon. 1 tablespoon = 8 grams. Maintenance dose is about twice that amount.
A**R
Great performance!
Great performance. Have high phosphates. I started with half the recommended dose, then two weeks later went to a full dose. Tested phosphates in the aquarium and water coming out if the reactor. Phosphate level was cut in half after going through the reactor. Will continue to buy!
O**E
Hard to rate...
This product seems to work at least as as well as (if not better than) the many different kinds of phosphate removers that I have tried—I continued to have an issue (but definitely better than without any phos remover). My algee was still a problem until I got a UV light. Would I buy this again? Yes.
A**.
Buen producto, hasta ahora ha funcionado bien
B**.
Reduces phosphates
I've been running this product through a Two Little Fishies Phosban Reactor 150 for the last two weeks and have already seen a modest decrease in my phosphate levels in my reef tank. Make sure you rinse it thoroughly before use. It took me quite a bit of rinsing before the granules were clean.
Trustpilot
2 days ago
4 days ago