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🐠 Dive into a thriving tank from day one with Nite-Out II!
Nite-Out II Starter Bacteria Aquarium 236 ml is a professional-grade liquid treatment that jumpstarts biological filtration by immediately breaking down ammonia and nitrite. Suitable for freshwater, marine, and shrimp tanks, it accelerates safe fish introduction and maintains natural water balance after water changes or filter cleaning. Trusted by aquascapers and backed by ARKA biotechnology, it offers a simple, effective solution for healthier aquarium ecosystems.


| ASIN | B005A3XA4A |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | 4,387 in Pet Supplies ( See Top 100 in Pet Supplies ) 37 in Aquarium Water Treatments |
| Brand | ARKA |
| Brand Name | ARKA |
| Country Of Origin | Germany |
| Customer Reviews | 4.6 out of 5 stars 2,792 Reviews |
| EU Spare Part Availability Duration | 2 Years |
| Global Trade Identification Number | 00097121211194 |
| Included Components | 1x Nite-Out II 236 ml |
| Item Form | Liquid |
| Item Highlight | for quick fish stocking, against ammonia and nitrite, after water conditioners, tank cycling, freshwater and saltwater |
| Item Type Name | NITEH08US |
| Item Weight | 236 Grams |
| Item form | Liquid |
| Item weight | 236 Grams |
| Liquid Volume | 236 Millilitres |
| Liquid volume | 236 Millilitres |
| Manufacturer | ARKA Biotechnologie GmbH |
| Manufacturer Part Number | NITEH08US |
| Model Number | NITEH08US |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pet Type | Fish |
| Product Warranty | 12 months |
| Target Species | Fish |
| UPC | 097121211194 |
| Unit Count | 236.0 millilitre |
| Unit count | 236.0 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!!
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
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.
S**R
Great thank you
Great thank you
N**H
Starter bacteria for aquarium s
Item is ok
K**L
Good
Good
J**S
Expensive liquid.
Not good would not buy again. Water didn’t look any different. Very watery, expected it too be thicker. Very expensive for something that doesn’t work.
E**I
Praktische Starterbakterien für ein gesundes Aquarium
Die ARKA Nite-Out II Starterbakterien machen einen sehr guten Eindruck und sind eine sinnvolle Ergänzung für die Aquarienpflege. Besonders praktisch finde ich, dass das Produkt sowohl bei der Neueinrichtung eines Aquariums als auch nach einem Wasserwechsel eingesetzt werden kann. Die Anwendung ist unkompliziert und die Dosierung lässt sich dank der praktischen Verschlusskappe gut durchführen. Besonders positiv finde ich, dass die enthaltenen Bakterien den biologischen Schadstoffabbau unterstützen und dabei helfen sollen, Ammonium und Nitrit abzubauen. Auch die vielseitige Verwendbarkeit für Süßwasser- und Meerwasseraquarien ist ein großer Pluspunkt. Die 118-ml-Flasche ist handlich, platzsparend und lässt sich gut verstauen. Insgesamt ein durchdachtes Produkt, das die biologische Stabilität im Aquarium unterstützen kann. Für mich eine gute Ergänzung zur regelmäßigen Aquarienpflege und definitiv 5 Sterne wert!
D**E
Te bakterie wchodzą do akwarium jak ekipa ratunkowa od wodnych dramatów
Nite-Out II pomaga akwarium szybciej stanąć na biologiczne nogi. Woda stabilniejsza, rybki mniej zestresowane, a człowiek nie patrzy co godzinę, czy już nadciąga katastrofa ekologiczna 😄 Zalety: • Pomaga szybciej ustabilizować akwarium • Nadaje się do słodkiej i morskiej • Łatwe dozowanie bez chemicznych czarów Wady: • Efekty wymagają kilku dni cierpliwości • Przy dużym zbiorniku szybko ubywa • Zapach mówi: „tu żyją bakterie” 😄
A**O
nice deal
Zoals verwacht
M**A
Excelente producto, pero el sellado necesita mejorar
Compro este producto aproximadamente cada dos semanas porque me da muy buenos resultados en mis acuarios. Cuando llega correctamente, me parece una de las mejores bacterias que he utilizado. Sin embargo, ya es la segunda vez que tengo que devolver un bote por el mismo motivo. El precinto exterior llega intacto, pero al desenroscar el tapón el sello de aluminio no está soldado al envase, sino pegado al interior del tapón. En cambio, otros productos de la misma marca, como el Sustrate Cleaner, sí llegan perfectamente sellados y hay que retirar el aluminio manualmente. Al tratarse de un producto con bacterias vivas, esta diferencia me hace dudar de si el envase ha mantenido las condiciones adecuadas. He grabado un vídeo desde el momento de abrir el paquete donde se aprecia claramente el problema. No pongo en duda la calidad del producto, porque cuando llega correctamente funciona de maravilla. Lo que sí pediría al fabricante es una explicación y un mejor control del sellado, para que el cliente pueda comprar con total confianza.
M**Y
Efficacia
Buon prodotto
Trustpilot
1 week ago
2 weeks ago