
Elimi-Phos Rapid is a highly effective, lanthanum-based liquid treatment designed for extremely rapid and significant phosphate reduction in both saltwater and freshwater aquariums. It works by quickly binding phosphates and precipitating them from the water column, which is crucial for preventing issues like nuisance algae outbreaks and promoting robust coral health and growth. This solution is particularly valuable during new aquarium break-in, rock curing, and cycling phases where phosphate levels can accumulate rapidly.
This 500 ml bottle provides a potent formula for quickly lowering phosphate concentrations to optimal ranges, typically between 0.02 ppm and 0.15 ppm for general aquariums, and a stricter 0.02 ppm to 0.1 ppm for reef environments. The lanthanum-based composition ensures extremely rapid removal of even high phosphate levels, effectively reducing them to a target of 0.2 – 0.4 mg/l (ppm) quickly. Its liquid form allows for convenient and precise dosing, either manually or via a dosing pump, enabling targeted reductions as needed.
Elimi-Phos Rapid is an essential product for reef aquarists and freshwater enthusiasts who are battling elevated phosphate levels that contribute to aggressive algae growth and hinder the vitality of corals and other aquatic life. It is especially beneficial for those establishing new tanks or curing live rock, as it proactively prevents phosphate accumulation before it can cause problems. Established aquariums experiencing phosphate spikes from various sources will also greatly benefit from its controlled, rapid reduction capabilities, helping to restore and maintain optimal water chemistry for a thriving and pristine aquatic environment.
| SKU | 212887 |
| Aquarium Type | Saltwater, Freshwater |
Works great and very convenient
This has worked very well for me to reduce phosphates. I would agree with the other reviewer, though, that you really need a dosing pump for this. I have mine controlled by my Apex dosing directly into my skimmer and dilute it 10x (and then adjust the dose 10x) to slow the delivery and make it easier to dose a small amount accurately. I test regularly and keep my phosphates around 0.03 to 0.04 in a heavily stocked SPS-dominant tank. I have several tangs (including two zebrasomas) and they've shown no ill effects that I can see after several months of use. Dosing straight to the skimmer and skimming heavily I think helps here to avoid having precipitate floating around. This stuff has to be used very carefully - you can bring your phosphates to zero very easily and potentially harm tangs with an overdose. But for me it's far cheaper and more convenient than using GFO.
This works great, but make sure to read and follow the directions. I was hand dosing this to my skimmer section of my sump and didn’t see much of any reduction in phosphates. I setup a daily dosing schedule with a BRS 1.5 ml pump and that allows it add slow enough without precipitating out. Phosphates are dropping at the described rate of 0.1 ppm per day.
Price History
500 ml Elimi-Phos Rapid
by Two Little Fishies
Test Kits
Reference reading: Species guide on Codexery
Species guides on Codexery
- Flame hawkfish — Scientific name: Neocirrhites armatus · Family: Cirrhitidae source
- Mandarinfish — Scientific name: Synchiropus splendidus · Family: Callionymidae (dragonets) source
1 retailer · 1 in stock
Compare Prices
Prices and availability change; we are not paid by these stores.
Active Deals
15% off 500 mL Elimi-Phos Rapid
On sale for $22.09 (regular $25.99)
All-time low price on 500 mL Elimi-Phos Rapid
New lowest price: $22.09 (previous low: $25.99)
15% price drop on 500 mL Elimi-Phos Rapid
Price dropped from $25.99 to $22.09















