🐟 Keep your fish thriving with every drop—because safe water is smart water!
EASY TO USE POWDER FORM - Convenient 250g powder that dissolves quickly for hassle-free water conditioning.
POWERFUL DETOXIFICATION - Effectively neutralizes nitrite and nitrate to maintain a healthy tank environment.
UNIVERSAL COMPATIBILITY - Perfectly formulated for both freshwater and marine aquariums—one solution for all your tanks.
TRUSTED BY AQUARISTS WORLDWIDE - Join thousands of professionals who rely on Seachem Safe for crystal-clear, safe water.
INSTANT CHLORINE CHLORAMINE REMOVAL - Protect your aquatic friends from toxic chemicals the moment you add water.
Seachem Safe Water Conditioner is a 250g powder designed to instantly remove chlorine, chloramine, and ammonia from aquarium water while detoxifying nitrite and nitrate. Suitable for both marine and freshwater tanks, it ensures a safe, healthy environment for all fish species without the need for batteries or complicated setups.
Specifications
Pet Type
Fish
Product Dimensions
6.2 x 6.2 x 12.22 cm; 294.84 g
Item model number
386
Item Form
Powder
Size
250 g
Number of Items
1
Quantity
1
Batteries required
No
Batteries Included
No
Item Weight
295 g
Have a Question? See What Others Asked
How much of this should I dose a 200L aquarium?
Hi How much would you need for a 200 litre tank? Does it come with a spoon? Do you need to mix before you put in the tank?
Can you make some up in liquid form to be stored and added as needed in the same way as Seachem Prime liquid?
I'm new to the hobby. What would this product be used for? Is it safe to use for starting new and all water changes?
Reviews
4.7
All from verified purchases
R**J
Smells awful but it works!
This thing stinks to high heaven, but it does what it's supposed to. I suggest putting it in a sealed "ziplock" type of bag to lock the smell in otherwise your entire house will smell.Tremendous value for money commpared to other dechlorinators.
K**S
Goes a long way
Goes a long way but if ur a beginner this might put you off as the measurements are wierd1/64th of a spoon and such.Recommend getting a jewellery scale and measuring of that as it easier and give u a more accurate dosage
C**S
Great value for money
Have a 450 litre tank and this will last me ages
M**N
1
Great product
L**M
Works wonders
Works really well, use this all the time on all my tanks. Lasts longer then its liquid version Prime.P.S it’s STINKS!
M**H
Quick Fix
Great for a quick fix for clearing ammonia and Nitrates
J**E
Really is brilliant addition.
Helps keep tank healthy and is a brliant addition or substitute for liquid versions of tapsafe
D**Y
A little goes a long way
If you have a tank like mine, 315 L then a little of this is going to go a long way. You will need micro scales. Absolutely stinks when opened liked eggs. However is good for making water safe for fish. Reduces nitrate.
Common Questions
Trustpilot
TrustScore 4.5 | 7,300+ reviews
Anjali K.
The product quality is outstanding. Exactly what I needed for my work.
1 month ago
Yusuf A.
Fantastic experience overall. Will recommend to friends and family.
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I suggest putting it in a sealed \"ziplock\" type of bag to lock the smell in otherwise your entire house will smell.Tremendous value for money commpared to other dechlorinators."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"K***S"},"datePublished":"15 May 2024","name":"Goes a long way","reviewBody":"Goes a long way but if ur a beginner this might put you off as the measurements are wierd1/64th of a spoon and such.Recommend getting a jewellery scale and measuring of that as it easier and give u a more accurate dosage"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"C***S"},"datePublished":"8 September 2024","name":"Great value for money","reviewBody":"Have a 450 litre tank and this will last me ages"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"M***N"},"datePublished":"11 April 2025","name":"1","reviewBody":"Great product"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"L***M"},"datePublished":"10 April 2024","name":"Works wonders","reviewBody":"Works really well, use this all the time on all my tanks. Lasts longer then its liquid version Prime.P.S it’s STINKS!"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"M***H"},"datePublished":"1 February 2025","name":"Quick Fix","reviewBody":"Great for a quick fix for clearing ammonia and Nitrates"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"4.0"},"author":{"@type":"Person","name":"J***E"},"datePublished":"1 August 2022","name":"Really is brilliant addition.","reviewBody":"Helps keep tank healthy and is a brliant addition or substitute for liquid versions of tapsafe"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"D***Y"},"datePublished":"13 August 2024","name":"A little goes a long way","reviewBody":"If you have a tank like mine, 315 L then a little of this is going to go a long way. You will need micro scales. Absolutely stinks when opened liked eggs. However is good for making water safe for fish. Reduces nitrate."}],"aggregateRating":{"@type":"AggregateRating","ratingValue":4.875,"bestRating":5,"ratingCount":8}},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How much of this should I dose a 200L aquarium?","acceptedAnswer":{"@type":"Answer","text":"That's a difficult question to answer. Depends on the situation. All instructions for how much to use are on the back of the container. Are you doing a weekly 20-25% water change? If so I would be only treating the new water in its container stir it up and wait 5 or 10 minutes before adding back to the aquarium. It's best to avoid adding chemicals directly if possible. Are you using to fix the chlorine before use in aquarium or to treat an ammonia spike? exact dose can depend on how much chlorine your water supply contains until you are familiar with this it can be very helpful to use those test strips 6in1 are what I have. they are very useful for telling you your aquariums water chemistry."}},{"@type":"Question","name":"Hi How much would you need for a 200 litre tank? Does it come with a spoon? Do you need to mix before you put in the tank?","acceptedAnswer":{"@type":"Answer","text":"1/4 off a spoon for 300 litres and i just put that in my 250 litre tank and all the fish are fine. just take some tank water put your 1/4 of a spoon in and mix then add to the tank. hope that helps"}},{"@type":"Question","name":"Can you make some up in liquid form to be stored and added as needed in the same way as Seachem Prime liquid?","acceptedAnswer":{"@type":"Answer","text":"no sure if that will work but its just as easy to put it into the water i use a jug to mix some in and pour it in as you go to fill the tank back up"}},{"@type":"Question","name":"I'm new to the hobby. What would this product be used for? Is it safe to use for starting new and all water changes?","acceptedAnswer":{"@type":"Answer","text":"In my opinion it is one of the best products on the market. It's used to dechlorinate your tap water and help neutralise ammonia and nitrates. You should use it with every water change. For a new tank, you should also use a filter bacteria boost to help with cycle the tank to help create the beneficial bacteria needed for your filter to make it safe for fish"}}]}]}