Instruction reads use 1 capful for every 50 gallons of new water. So a 35% change on 55 gal. tank, takes 1/4 cap? Sounds too good to be true.

Per Seachem's instructions, if you are doing a partial water change of 35%, if you are adding water directly from the tap (such as with a water changer such as a Python or Aqueon) you add enough Prime for the volume of the whole tank. On the other hand, if you're removing 35% and then adding the water using a bucket, you can dechlorinate the amount of each bucket. For example, if you're using a 3 gallon bucket, 6 drops Prime per bucket, and then add that to the tank. The Prime works almost immediately, so just add the drops to the bucket, and then it is ready to pour into your tank.

How long does it take to work when setting up a new tank? Thanks!!

this removes the chlorine, etc. almost immediately, I add it to the aquarium when doing water changes, ands just pour the water into the tank. remember this just removes the harmful chemicals, your tank will still have to cycle through the nitrogen cycle if you are setting up a new tank.

I end up with alot of foam at the top of my aquariums when I add prime,Have I added too much to my tap water changes,My Tap water is high in iron

The small bottle of prime has a flip cap which allows you to add drops. If you have the large bottle of Prime use an eye dropper. When doing a water change, fill a clean, never seen soap or chemicals bucket of fresh water and add Prime to this fresh water, not directly into your tank - 2 drops per gallon. I also do not get foam. I do a 50 - 60 percent water change weekly along with a gravel vac. If you are stll getting foam after a gravel vac and water change I would suggest you give Seachem a call. They have great customer service. When cleaning your tank, give your filter sponge, floss a swish around in used tank water also to remove some of the gunk and put right back in. Do not rinse in untreated fresh water, by doing so you can lose your cycle.

I'm looking to remove chlorine from my pool, will this work?

It will work but there may be less expensive options from a pool dealer. It decholorinates any typerson of water.

Seachem Prime 500ml | Desertcart Austria

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Description

💧 Keep your aquarium pristine and your fish thriving with Seachem Prime – the pro’s secret to flawless water!

BIOFILTER BOOSTER - Transforms ammonia and nitrites into non-toxic forms, enhancing biofilter efficiency during tank cycling.
ULTIMATE WATER DETOX - Neutralizes chlorine, chloramine, and binds toxic ammonia for a safer aquatic environment.
HEAVY METAL DETOXIFIER - Effectively detoxifies harmful heavy metals at typical tap water levels, protecting your fish.
NATURAL SLIME COAT SUPPORT - Promotes the fish’s natural slime coat restoration, boosting immunity without artificial additives.
UNIVERSAL FRESH SALTWATER USE - Concentrated formula works seamlessly in both freshwater and marine aquariums, ensuring versatile protection.

Seachem Prime 500ml is a concentrated aquarium water conditioner that removes chlorine, chloramine, and detoxifies ammonia, nitrite, nitrate, and heavy metals. Suitable for both fresh and saltwater tanks, it supports biofilter efficiency and promotes natural slime coat restoration without altering pH or overactivating skimmers. One bottle treats up to 1000 gallons, making it a must-have for professional and hobbyist aquarists alike.

Specifications

ASIN	B00025694O
Allergen Information	BPA-Free
Best Sellers Rank	#262 in Pet Supplies ( See Top 100 in Pet Supplies ) #1 in Aquarium Water Quality Testing & Treatment
Brand	Seachem
Brand Name	Seachem
Country of Publication	USA
Customer Reviews	4.6 out of 5 stars 40,303 Reviews
Global Trade Identification Number	00000116043304
Item Form	Liquid
Item Type Name	Aquarium Conditioner
Item Weight	0.6 Kilograms
Item form	Liquid
Item weight	0.6 Kilograms
Liquid Volume	500 Milliliters
Liquid volume	500 Milliliters
Manufacturer	Seachem
Manufacturer Part Number	075220
Model Number	67104330
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	701485546228 707005178788 611102106516 000116043304
Unit Count	1 Count
Unit count	1 Count

Reviews

J**N

Good Product

Highly recommended product

23.01.2026

D**N

Must have for aquarists!

You'll definitely need a as the tap water isn't safe for fishes, and seachem prime is one of the best out there.

22.09.2024

F**D

Excellent product

Products is very effective in reducing chlorine content and required only 5ml for 200L of water.

12.11.2024

J**E

I like it

Very effective

23.04.2024

L**A

Good

13.02.2026

G**M

As mentioned same contended

Good for new tank

12.10.2024

V**R

Great product

Use for anti chlorine

24.09.2023

E**.

Perfect!!

I love this product

24.10.2023

A**N

Good

It good

29.05.2026

C**A

Il miglior prodotto per risolvere casini

Uso Seachem Prime biocondizionatore per acqua dell’acquario da diversi mesi e posso dire che è uno dei pochi prodotti davvero indispensabili in acquario. È estremamente concentrato: ne basta pochissimo per trattare tanti litri, quindi alla fine dura una vita e costa meno di quanto sembri. Io lo uso ad ogni cambio d’acqua e non ho mai avuto problemi con cloro o stress dei pesci. Ottimo anche il fatto che aiuti a “tamponare” ammoniaca e nitriti in situazioni critiche, cosa che altri prodotti non fanno. L’unico lato negativo è l’odore abbastanza forte (tipo zolfo), ma sparisce subito e non crea problemi in vasca. Attenzione solo al dosaggio: essendo molto concentrato conviene usare una siringa o misurare bene. Nel frattempo che carica le foto riepilogo dunque.. In sintesi: prodotto affidabile, efficace e molto conveniente nel tempo. Una volta provato, difficilmente si torna ad altro. Con uno si questi di norma si passa un anno intero se non di più.

16.04.2026

N**S

Efficace mais bouteille abimée

Le produit a un réel impact sur les analyses d'eau, très efficace à petite dose. Seul aspect dérangeant: son odeur de soufre à l'ouverture de la bouteille. Mais une fois dans l'eau ça ne sent rien. J'ai reçu par contre une bouteille abimée, l'embouchure était tordue et une fois enlevé l'opercule, l'étanchéité était compromise, j'ai dû transvaser le produit dans une autre bouteille.

24.04.2024

C**N

Toujours au top.

Produit toujours au top pour mon aquarium, jamais eu de soucis et flacon qui dure souvent plus que les autres car moins dilué avec de l'eau que certaines autres marques.

19.11.2020

J**Z

Indispensable para tu agua de acuario

Producto necesario e indispensable para todos los que tenemos acuario en casa. Rinde muchísimo ya que una sola gota trata varios litros y el efecto es inmediato. Si utilizas agua del grifo para cambios de agua es necesario utilizar prime para eliminar cloro y cloraminas. Además sirve para una emergencia temporal donde tengas un pico de amonio o nitritos reduciéndolos de manera inmediata. Es un seguro para tu acuario tenerlo en casa. Totalmente necesario y de la marca reconocida Seachem.

17.10.2025

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