Liquid algaecide for swimming pools - Alg out 15%
Liquid algaecide for swimming pools - Alg out 15%

Liquid algaecide for swimming pools - Alg out 15%

$14.81
$14.81
0% off
$14.81

Algaecide 15% (4 Litres) is an effective solution for pool water treatment. It destroys algae in pools, including black, green, mustard, and other types. This product also helps with the flocculation of dead algae and deposits at the bottom of the pool, making cleaning easier.

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SKU: 26305

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The 15% algaecide is designed to effectively eliminate algae in pool water while helping to maintain clear and healthy water. Its formula acts quickly against several types of algae and facilitates their removal during pool cleaning.

Features

  • Effective liquid algaecide for eliminating algae present in water
  • Effective against green, black, mustard algae and other types of algae
  • Helps with the flocculation of dead algae and deposits at the bottom of the pool
  • Promotes clear and well-balanced water
  • Ideal for regular maintenance and algae prevention
  • Convenient 4-liter format
  • Type: Liquid algaecide
  • Concentration: 15%
  • Size: 4 liters
  • Application: treatment and prevention of algae in swimming pool water
Main Actions: Eliminate algae
Product Category: Algaecides
Forms: Liquid
Application Method: To pour directly into the water
Visual Issues: Green water
Safety and Storage: Protect eyes, Avoid contact with skin, Keep out of reach of children and animals, Follow the manufacturer's instructions, Store in a cool, dry place
Basin Type: Pool

Keep out of reach of children. Avoid contact with skin and eyes. Do not mix with other chemicals. Store in a cool, dry place in its original, tightly closed container.

In case of contact with eyes or skin, rinse thoroughly with water for several minutes. In case of ingestion or significant exposure, seek immediate medical attention or contact a poison control center.
Delivery is free for chemicals and small accessories with purchases of $50 or more. A $10 fee applies to orders under $50. We deliver quickly across Canada for this item.

Add the algaecide directly to the pool water according to the recommended dosage based on the water volume. Use regularly to prevent algae growth and maintain clear water.

If visible algae are present, perform a shock treatment with an appropriate disinfectant and then add the algaecide to eliminate the algae and facilitate their removal during cleaning.

Key Characteristics

Elimination

Product designed to effectively destroy algae and ensure healthy and safe water.

Concentration

Algicide 15% liquid, effective for eliminating algae in swimming pool water

Preventive action

Destroys and prevents the formation of algae to maintain clear and clean water.

Simple to use

Simple dosage for regular pool maintenance.

Visual problems in a swimming pool

In this video, discover a complete guide to identifying and correcting the most common visual problems in your swimming pool.

Cloudy, milky, or greenish pool water can quickly spoil the enjoyment of swimming. These visual problems are often a sign of chemical imbalances, ineffective filtration, or the presence of algae. Fortunately, solutions exist to remedy these issues and prevent their recurrence.

See the full guide

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Liquid algaecide for swimming pools - Alg out 15%
Liquid algaecide for swimming pools - Alg out 15%
Algaecide 15% (4 Litres) is an effective solution for pool water treatment. It destroys algae in pools, including black, green, mustard, and other types. This product also helps with the flocculation of dead algae and deposits at the bottom of the pool, making cleaning easier.
Read more Read less
  • Liquid algaecide 15% – Helps eliminate algae present in swimming pool water.
  • Action against several types of algae – Works against green, black, mustard and other common algae.
  • Compatible with pool treatments – Can be used with chlorine or bromine for water maintenance.
  • Helps clarify water – Promotes the flocculation of dead algae and deposits at the bottom of the pool.
  • Simple to use – Suitable for above-ground and in-ground pools for algae treatment and prevention.
  • Easy application – Add directly to the water according to the pool's volume. If algae are visible, perform a shock treatment and then add the algaecide to help eliminate the algae.
$14.81
$14.81
$14.81
Liquid algaecide for swimming pools - ALGAE 40
Liquid algaecide for swimming pools - ALGAE 40
This 40% liquid algaecide is designed to effectively prevent and eliminate algae in your pool water, maintaining clear and well-balanced water. Its non-foaming formula works quickly while complementing the action of chlorine or bromine.
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  • Liquid algaecide 40% – Helps eliminate algae present in swimming pool water.
  • Preventive action – Helps prevent the formation and spread of algae.
  • Compatible with pool treatments – Complements the action of chlorine or bromine for water maintenance.
  • Non-foaming formula – Designed to work effectively without harming the filtration system.
  • Simple to use – Suitable for above-ground and in-ground pools.
  • Recommended dosage – Approximately 45 mL per 10,000 L of water per week for maintenance.
$25.93
$25.93
$29.63
Preventive algaecide tablets for swimming pools – Alg Zero
Preventive algaecide tablets for swimming pools – Alg Zero
This 3-in-1 product is an innovative solution for pool water treatment. In the form of pre-measured tablets, it offers long-lasting action that prevents algae growth, helps improve water filtration, and maintains pool temperature. Easy to use, it is designed to be placed in the skimmer, providing a simple and safe solution for pool maintenance.
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  • 3-in-1 treatment in tablet form – Helps prevent algae formation while helping to maintain clear and balanced pool water.
  • Effective action against algae – Helps destroy and prevent green, yellow and black algae.
  • Improves water quality – Helps improve filtration efficiency and maintain more stable water.
  • Convenient pre-measured tablets – Easy-to-handle and safe format for simple pool maintenance.
  • Gradual dissolution – Gradually releases the product for continuous action and regular maintenance.
  • Recommended dosage – 14 g per 10,000 L of water per week for maintenance
$29.63
$29.63
$33.34

Discover our product line

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Problème d'algues Eau verte, noir ou brune Eau verdâtre ou jaunâtre Taches dans les marches Eau brouillée Problème de filtration

Apparence : Présence de dépôts d’algues au fond, souvent accompagnée d’une sensation de glissance sur les parois.

Causes possibles :

  • Prolifération avancée d’algues (vertes, noires ou moutardes)
  • Désinfection inefficace ou filtration arrêtée

Solutions :

  • Appliquez un traitement choc à base de chlore ou un oxydant
  • Ajoutez un algicide adapté au type d’algues
  • Brossez vigoureusement les surfaces atteintes

Liquid algaecide 60% more for swimming pools

2 Format
$21.48
$21.48
$21.48

Bionic shock treatment 500g for swimming pools

$11.85
$11.85
$11.85

ALGUE 60

$37.04
$37.04
$41.49

Brilliance Shock Treatment for Pools

4 Format
From $8.88
From $8.88
$8.88

3-in-1 Shock Treatment for Swimming Pools - Shine 2.0

$29.63
$29.63
$44.45

Extreme Pool Opening and Repair Kit

$51.86
$51.86
$51.86

Liquid algaecide for swimming pools - ALGAE 40

$25.93
$25.93
$29.63

Gold pool opening and repair kit

2 Composition
From $51.86
From $51.86
$62.98

Apparence : L’eau prend une teinte verte foncée, noire ou brunâtre, souvent accompagnée de glissance sur les parois.

Causes possibles :

  • Prolifération avancée d’algues (vertes, noires ou moutardes)
  • Présence de métaux dans l’eau (fer, cuivre, manganèse)
  • Désinfection inefficace ou filtration arrêtée

Solutions :

  • Appliquez une trousse corrective
  • Brossez vigoureusement les surfaces atteintes
  • Faire des analyses de l'eau avant et après la trousse corrective

Bionic shock treatment 500g for swimming pools

$11.85
$11.85
$11.85

3-in-1 Shock Treatment for Swimming Pools - Shine 2.0

$29.63
$29.63
$44.45

Extreme Pool Opening and Repair Kit

$51.86
$51.86
$51.86

Gold pool opening and repair kit

2 Composition
From $51.86
From $51.86
$62.98

Apparence : L’eau semble verdâtre clair ou jaunâtre, même si elle reste relativement limpide.

Causes possibles :

  • Présence de métaux oxydés (fer ou cuivre)
  • Réaction entre le chlore et les minéraux
  • Début de contamination par algues moutardes

Solutions :

  • Testez la présence de métaux dans l’eau
  • Ajoutez un séquestrant de métaux
  • Ajustez le pH et effectuez un traitement préventif avec un algicide non moussant

Bionic shock treatment 500g for swimming pools

$11.85
$11.85
$11.85

Brilliance Shock Treatment for Pools

4 Format
From $8.88
From $8.88
$8.88

3-in-1 Shock Treatment for Swimming Pools - Shine 2.0

$29.63
$29.63
$44.45

Clarifier and anti-metal for swimming pools - Clari metaloc

2 Format
$14.81
$14.81
$18.52

Apparence : Taches brunes, jaunes, vertes ou noires localisées sur les marches ou dans les coins de la piscine.

Causes possibles :

  • Dépôts métalliques (taches de cuivre, de fer)
  • Taches organiques (feuilles, débris végétaux en décomposition)
  • Présence d’algues noires très incrustantes

Solutions :

  • Brossez les zones atteintes
  • Identifiez le type de tache (test avec vitamine C ou chlore direct)
  • Appliquez un produit détachant spécifique (organique ou métallique)
  • Ajustez l’équilibre de l’eau pour éviter la récidive

Bionic shock treatment 500g for swimming pools

$11.85
$11.85
$11.85

Brilliance Shock Treatment for Pools

4 Format
From $8.88
From $8.88
$8.88

3-in-1 Shock Treatment for Swimming Pools - Shine 2.0

$29.63
$29.63
$44.45

Swimming pool stain remover - Magic stain remover 2 kg

$33.34
$33.34
$33.34

Stain remover and anti-metal for swimming pools - Metaloc plus

$23.70
$23.70
$23.70

Pool stain remover - Scale free

$24.44
$24.44
$24.44

Stain remover and anti-metal for swimming pools - Scale Defender BIOGUARD

$29.63
$29.63
$42.23

Stain remover and anti-metal for swimming pools - Scale defender Bioguard

$14.81
$14.81
$18.52

Apparence : L’eau semble trouble, laiteuse, parfois légèrement grise ou blanchâtre.

Causes possibles :

  • Mauvaise filtration (filtre sale ou saturé)
  • Déséquilibre chimique (pH, alcalinité, dureté)
  • Résidus en suspension (crème solaire, pollen, débris organiques)
  • Manque de désinfectant

Solutions :

  • Nettoyez ou remplacez le média filtrant (sable, cartouche, billes de verre)
  • Ajustez le pH entre 7,2 et 7,6
  • Effectuez un traitement choc
  • Utilisez un clarifiant pour regrouper les fines particules

Bionic shock treatment 500g for swimming pools

$11.85
$11.85
$11.85

Brilliance Shock Treatment for Pools

4 Format
From $8.88
From $8.88
$8.88

3-in-1 Shock Treatment for Swimming Pools - Shine 2.0

$29.63
$29.63
$44.45

MIRACLAIR TAB 600G

$22.22
$22.22
$22.22

Swimming pool clarifier tablets - Clari simple

2 Format
$5.18
$5.18
$5.18

Liquid pool clarifier - Blue clarifier

2 Format
$12.59
$12.59
$12.59

Apparence : L’eau ne s’éclaircit pas malgré les traitements ou redevient rapidement trouble.

Filtreur à cartouche :

  • Bien rincer la cartouche
  • Nettoyer la cartouche avec le Nettoyant à filtres
  • Remplacer la cartouche

Filtreur au sable :

  • Faites un contre-lavage ou un nettoyage en profondeur du filtre
  • Nettoyer le sable
  • Remplacez le sable ou le média filtrant

Pool Filter Cleaner - FILTER ACTION 2L

$19.26
$19.26
$19.26

Cartridge Cleaner for Pools - Cartridge + 3.6L

$29.63
$29.63
$32.60

Swimming pool filter cleaner

2 Format
$11.11
$11.11
$11.11

Pool/Spa Cartridge Cleaning Tool

$14.81
$14.81
$14.81

Perflex Cleaning Wand for cartridge

$29.63
$29.63
$29.63

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Tips and advice

Que dois-je faire si l'eau de ma piscine est verte?
What should I do if my pool water is green?
L’eau de votre piscine est verte ? Retrouvez votre belle eau bleue en 48 heures grâce à la trousse Corrective Gold. C’est une solution simple, rapide et efficace pour éliminer les algues sans effort. Dans cette capsule informative, on vous présente LA meilleure trousse pour partir ou remettre votre piscine en bonne état ! Ça se produit la plupart du temps en début de saison, mais en tout temps, ça peut arriver. On prend des vacances, la piscine manque d’entretien pendant plusieurs jours et malheureusement les algues commencent à se former. Ne vous inquiétez pas, Trévi a une solution très simple pour vous aider à ramener l’eau de votre piscine bleue. La Trousse corrective Gold de Trévi comprend quelques produits à mettre dans votre piscine et ça vous garantit qu’en 48 heures l’eau de votre piscine s’améliorera de façon considérable. Nous allons le faire dans cette piscine et regarder le résultat. Avant de commencer par contre, il est très important que le PH de votre piscine ait été ajusté et soit en bas de 7.2 sinon va compromettre le résultat. Donc ici l’eau a un PH de : 7.0 On enlève toutes les feuilles au fond de la piscine et on ajoute les produit. On peut commencer en y ajoutant l’accélérateur, le Oxy Gold et les granules de chloration directement dans l’eau de la piscine, sans délais d’attente. On ajoute ensuite les tablettes clarifiantes, le clari-simple, dans l’écumoire. Elles vont se dissoudre rapidement. Il est bien important que la pompe de la piscine soit en fonction pour que la circulation d’eau se fasse. On laisse agir le tout pendant 48h. Vous allez rapidement voir une belle différence. Après ce délai, vous pourrez passer l’aspirateur en mode Waste ou en envoyant l’eau directement à la rue si vous avez un filtreur à cartouche pour bien nettoyer le fond de votre piscine. Par la suite, il est important de faire un lavage à contre-courant ou de bien nettoyer votre cartouche pour enlever toutes les algues qui vont s’y être retrouvées durant le traitement. On veut partir la saison avec du sable ou une cartouche bien propre pour une filtration optimale. Finalement, n’oubliez pas de passer en magasin avec un échantillon d’eau pour la faire analyser et bien la balancer pour avoir une eau propre, saine et agréable à la baignade. La trousse Corrective Gold, c’est SIMPLE, EFFICACE et GARANTIE
Trevi
Proudly made in Quebec
Read our advice

FAQ



The quantity depends on the water volume and the type of algaecide used. Generally, a weekly dose indicated on the label is added (often between 25 and 50 mL per 10,000 L for maintenance). For initial treatment or after an algae problem, the dose can be doubled according to the manufacturer's recommendations. It is always best to follow the product instructions to avoid foaming or unnecessary overconsumption.



Yes. Algaecide is compatible with salt water pools because it doesn't interfere with the salt cell or chlorine production. In fact, it can be particularly useful in salt water pools, where chlorine production can fluctuate depending on temperature and sunlight. Algaecide acts as an additional protective measure to prevent algae growth between production cycles.



To apply the algaecide, pour the recommended amount directly into the pool, preferably around the perimeter, with the pump running. Then let it circulate for several hours to ensure the product is evenly distributed. If you are treating an early algae bloom, brush the walls before application to maximize effectiveness. Never mix algaecide and chlorine in the same bucket.


Algaecide is primarily used as a preventative measure. It is added once a week during the season to prevent algae growth, especially during hot periods, after heavy rain, or when there is a lot of swimming. It can also be added after opening the pool, as well as after a shock treatment, to enhance protection. Algaecide is not designed to replace chlorine, but to help keep the water clear and prevent problems before they occur.



Yes, they can be used together, as they have complementary functions: chlorine disinfects and algaecide prevents algae growth. However, they should never be mixed in the same container; add them separately to the pool with the pump running.
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