Clarity, 100 mL / 3.4 fl. oz.

$9.89

Added to wishlistRemoved from wishlist 0
Add to compare


Price: $9.89
(as of Oct 28, 2025 19:28:16 UTC – Details)


Seachem’s Clarity water clarifier for marine and freshwater is the ultimate solution to remove cloudiness from your tank or aquarium.

For over three decades, Seachem has been a company rooted in sound science. Our experience in the hobby and an educated staff of chemists and biologists are part of the package when you purchase Seachem products. Seachem remains as one of the few surviving independent and privately owned pet care companies. Seachem is owned and operated by hobbyists. All of our employees are hobbyists who maintain aquariums at home and at the office. Seachem itself was started because one such passionate hobbyist – Dr. Leo G. Morin (Founder) – recognized that the available solutions to aquarists problem wanting. This resulted in Seachem’s very first product: Cupraplex (today known as Cupramine). Over thirty years later Seachem is still approaching old problems in a new way.

Seachem’s philosophy is that the knowledgeable hobbyist makes the best customer. This is reflected in solid and reliable customer education and support as well as products proven in science and performance. While Seachem has grown rapidly into a national and international firm, it retains the culture of a small company and is readily available to its customers.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 1.62 x 1.62 x 4.88 inches; 1.6 ounces
Manufacturer recommended age ‏ : ‎ 1 month and up
Item model number ‏ : ‎ 145
Date First Available ‏ : ‎ October 15, 2006
Manufacturer ‏ : ‎ Seachem Laboratories, Inc.
ASIN ‏ : ‎ B0006JLX7E
Best Sellers Rank: #12,991 in Pet Supplies (See Top 100 in Pet Supplies) #95 in Aquarium Water Treatments
Customer Reviews: 4.5 4.5 out of 5 stars 3,894 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

Water clarifier for marine and freshwater
Clears all types of clouding
Reef and plant safe

Customers say

Customers find the water clarifier easy to use and safe for plants and fish. The product receives mixed feedback about its effectiveness, with some reporting it clears water quickly while others say it makes it cloudy. While some customers consider it good value, others feel it’s a waste of money. The appearance and water quality aspects also receive mixed reviews, with some finding it looks amazing while others say it looks horrible, and some reporting excellent water parameters while others mention filters getting clogged. Several customers report their fish dying after using the product.

13 reviews for Clarity, 100 mL / 3.4 fl. oz.

0.0 out of 5
0
0
0
0
0
Write a review
Show all Most Helpful Highest Rating Lowest Rating
  1. Mama

    Works great to combat biofilm from driftwood
    I put some driftwood in my 75gal and it quickly covered in biofilm. The water looked “dusty” so I tried this after reading the dust was tiny bacteria or algae. It was a little cloudy after using it, but I woke up to my tank being crystal clear. It’s blowing my mind, honestly. Great product!

    Helpful(0) Unhelpful(0)You have already voted this
  2. Lexx

    as described
    all seachem products are great. they work exactly as described when used exactly as directed. It is the only system that I use for my planted aquariums and it has never failed me! this product is not an exception!

    Helpful(0) Unhelpful(0)You have already voted this
  3. S

    Clears up cloudy water quickly
    I used this to clear up cloudy water due to adding sand substrate to a new reef aquarium. Works perfectly!

    Helpful(0) Unhelpful(0)You have already voted this
  4. Lillian

    helped
    used this to get some detritus out of suspension during setup. would not use on any aquarium with a filter requiring effort to change, or where the physical filtration is intense. i cant tell how much it helped, but it definetly did SOMEthing

    Helpful(0) Unhelpful(0)You have already voted this
  5. Irvin A.

    Be patient and be careful
    Great product. Just be sure to use half of the recommended amount as it can potentially be lethal to your fish as some species are more sensitive than others. You will have to wait a bit longer for the product to take full effect due to this, so keep that in mind. It can take anywhere from a few days, to a few weeks. In my case, it didn’t clear up my water up until 2 weeks after I had used it. The water in my tank was always cloudy even after weekly water changes and I couldn’t get it to be crystal clear, which was very frustrating. I am also aware that the size of my tank should be bigger (I will upgrade as soon as I can) and was definitely a huge factor towards my water quality being less than ideal, so I definitely took that into account before even considering giving this product any kind of review. Wish I had a before video of my tank to show how bad it was, just know it works well if you use it carefully and are patient. Very pleased with this product, my goldfish tank (the dirtiest tank with the cloudiest water because of how messy goldfish tend to be) is now looking good!

    Helpful(0) Unhelpful(0)You have already voted this
  6. Harry

    La calidad y puntualidad
    Compré estos productos por qué tienen muy buena reputación

    Helpful(0) Unhelpful(0)You have already voted this
  7. HiroBc

    Surprisingly Underwhelming
    I recently switched to using prime and based on the good results I decided to try clarity instead of my usual clarifier accu-clear. Visually the color reminded me of acural-f and disperses as a cloud binding all the particles together and pulling them to the bottom. Now bearing in mind that no two tanks are alike it’s efficiency will vary, In my situation it performed poorly in comparison to both accu-clear and acural-f. A company like seachem does I’m sure heaps of research and testing and i notice all their products seems designed to be used as a whole, so my results my be differ when used as a stand alone product. If you have a product that’s not giving you the results this is worth trying, though I wouldn’t suggest putting it at the top of your list

    Helpful(0) Unhelpful(0)You have already voted this
  8. Amazon Customer

    I must forcaquariums
    This works rapidly and does a really great job for cloudy water.

    Helpful(0) Unhelpful(0)You have already voted this
  9. Paul Bateman

    Works a treat

    Helpful(0) Unhelpful(0)You have already voted this
  10. TorontoShopper

    I’ve used several other brands of aquarium “de-clouder” and this is BY FAR my preference.This brand is the best deal because YOU USE MUCH LESS product per use. LESS THAN A CAP-FULL for 10gallon tank. The product works very well. Its not instant (mine was overnight), but good quality takes good time.Definitely try it out.

    Helpful(0) Unhelpful(0)You have already voted this
  11. Nick R

    Seachem offers a line of AMAZING products, this works fantastic and does exactly what the bottle say, just remember to follow the instructions accurately.

    Helpful(0) Unhelpful(0)You have already voted this
  12. mark rogers

    I have kept marine fish and seahorses for years. In my dedicated seahorse tank the water went cloudy, so did what I always do clean filter/ protein skimmer , and big water change. Result no change. Decided to give this a go as I couldnt work out what had gone wrong and why. It worked , after my trying to sort it over 2 days, this worked in 2 hours. I still not sure what happened to my water quality and why. Highly recommended for a quick fix once you’ve tried everything else

    Helpful(0) Unhelpful(0)You have already voted this
  13. Nathan

    Works awesome

    Helpful(0) Unhelpful(0)You have already voted this

    Add a review

    Your email address will not be published. Required fields are marked *

    Clarity, 100 mL / 3.4 fl. oz.
    Clarity, 100 mL / 3.4 fl. oz.

    $9.89

    Best Deals for all new
    Logo
    Compare items
    • Total (0)
    Compare
    0
    Shopping cart