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🐠 Dive into crystal-clear waters from day one!
ARKA Nite-Out II is a 118 ml liquid starter bacteria solution designed to jumpstart biological filtration in small aquariums. It rapidly reduces harmful ammonia and nitrite levels through natural bacterial action, stabilizing water quality and enabling safe fish and coral stocking sooner. Safe for all freshwater and saltwater tanks, this organic formula requires no mixing and is trusted globally by aquatic professionals.











| ASIN | B005A3X9YQ |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | 4,628 in Pet Supplies ( See Top 100 in Pet Supplies ) 46 in Aquarium Water Treatments |
| Brand | ARKA |
| Brand Name | ARKA |
| Country Of Origin | USA |
| Customer Reviews | 4.7 out of 5 stars 2,652 Reviews |
| EU Spare Part Availability Duration | 2 Years |
| Global Trade Identification Number | 00097121211187 |
| Included Components | 1x Nite-Out II 118 ml |
| Item Form | Liquid |
| Item Type Name | NITEH04US |
| Item Weight | 0.13 Kilograms |
| Item form | Liquid |
| Item weight | 0.13 Kilograms |
| Liquid Volume | 118 Millilitres |
| Liquid volume | 118 Millilitres |
| Manufacturer | ARKA Biotechnologie GmbH |
| Manufacturer Part Number | NITEH04US |
| Model Number | NITEH04US |
| Product Warranty | 12 |
| Target Species | Fish |
| UPC | 097121211187 |
| Unit Count | 118.0 millilitre |
| Unit count | 118.0 millilitre |
D**B
Life saver!
Had a well established nano brackish Opae shrimp tank that got badly contaminated by a rogue clump of seaweed popped in by a well meaning friend's little girl. No amount of partial water changes could clear the think stringy brown mess in the tank so grabbed some of this and just had to start afresh. Opaes are hardy l know, but even so, cycling a tank from scratch with them in worried me sick. Needn't have stressed out - this stuff is a life saving miracle! Yes it does pong a bit, and it has to be kept in the fridge, but its kept all parameters safe, water is clear and my shrimps are cherry red and happy bunnies again. Really impressive stuff!!
J**O
Good product.
Works well on new tanks and when changing water to get rid of HIGH nite.
V**A
Good value for money
This item helped me to set up new aquarium, also use this every time when changing water to keep my fish healthy.
S**S
It works !
Tldr. If it stinks, you haven't shaken it up enough. It works. It cycled my 25l tank fully in a week with 20% water changes everyday when I got home from work. I inherited fish so had to put them in on day one. 9 harlequin, 4 amano shrimp and 3 oto. I just used the tetra test strip for ease of testing. Nitrites and nitrates were at 0 on day 8. Once opened keep it in the fridge. Made the water a bit cloudy but don't worry about it as that cleared up a couple of days after I stopped using it. All fish are feeding well and the harlequin were even showing breeding behaviour after day 4.
K**L
Good
Good
R**U
Good
Using this to start my tank, so far so good things are moving quickly in my fishless cycle
I**I
Better than almost all mainstream alternatives
I have tried other bottled 'bacteria' from Seachem, Tetra, API and this one is superior in results. Compared to other alternatives on the market, I think it has cultures of the right bacteria (Nitrosomonas, Nitrospira and Nitrobacter) compared to other market alternatives that usually have heterotrophs or anaerobes. In my case, it dropped nitrites to near zero in under 30 hours. PROS: - Works under 24 hours in emergencies - No bloom/cloudy water CONS: - More expensive than others - Opened bottle needs to be put in your fridge
A**H
Use this brand for kh booster, let's see if this is just as good
Bought this as I'm ripping my hair out with nitrites, however I have to say I use the this brand for kh booster and is really good, so am expecting this to do what says on the bottle. I have to say the smell, smells like stink bombs hahaha so yes a peg is a must and I shook it for ages lol. Over all we will see.
M**S
Funciona espectacular
Funciona excelente, se nota a los pocos días de sus uso, en mi caso lo usé tras un cambio total de la arena del mmi acuario, eso produjo picos de nitritos al remover todo, pero este producto hizo su magia en tres días. lo seguiré usando con los cambios de agua. Importante mantener refrigerado una vez abierto el embase.
❤**️
🐠 Perfekter Start fürs Aquarium – wirkt schnell & stabilisiert zuverlässig! 💧🌿
Ich habe den ARKA Nite-Out II Starterbakterien-Zusatz beim Einfahren meines neuen Aquariums verwendet, weil ich von Anfang an stabile Wasserwerte wollte. Schon nach wenigen Tagen konnte ich sehen, dass sich die Trübung im Wasser legt und sich der Nitritwert gar nicht erst kritisch aufgebaut hat. Genau das, was man sich wünscht, wenn man ein Becken frisch startet. Das Mittel enthält lebende Bakterien, keine chemischen Zusätze – man merkt das auch am Verhalten der Fische. Ich habe nach einer Woche ein paar Garnelen und später den ersten kleinen Fischbesatz eingesetzt, und alles verlief ohne Stress oder auffälliges Verhalten. Kein Nitritpeak, kein hektisches Atmen – die Tiere fühlten sich direkt wohl. Ich gebe es mittlerweile bei jedem Wasserwechsel in kleiner Dosis dazu, um das biologische Gleichgewicht zu stabilisieren. Gerade wenn man mal gründlicher reinigt oder neue Pflanzen einsetzt, hilft es, das System schnell wieder ins Gleichgewicht zu bringen. In Kombination mit ARKA Special Blend funktioniert es sogar noch besser – das Wasser bleibt klar, und der Filter arbeitet konstanter. Man merkt, dass sich die Mikroflora im Becken besser einpendelt und weniger Ablagerungen entstehen. Auch positiv: Es riecht neutral, lässt sich leicht dosieren, und man braucht wirklich nur wenig davon. Für kleine wie große Becken gleichermaßen geeignet. ⭐️⭐️⭐️⭐️⭐️ Fazit: Ein absolut zuverlässiger Helfer beim Neustart oder Wasserwechsel. Stabilisiert die Wasserwerte, reduziert Nitritspitzen und sorgt dafür, dass sich Fische und Garnelen von Anfang an wohlfühlen – biologisch, sicher und wirkungsvoll. 💦🐟
G**A
Attivatore biologico ok
Ottimo prodotto ad un buon prezzo
S**S
Top
Top
D**E
Très utile
Un très bon mélange de bactéries vivantes pour la stabilité et la qualité d’eau du bac. Résultats rapides et visibles. Très utile en entretien ou en renforcement biologique. Je recommande
Trustpilot
1 month ago
1 month ago