Sobo WP-308H Slim Hang-On Aquarium Filter | up to 70L (Nano–2 ft) | Fish Bazaar
Rs. 2,110.00
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Sobo WP-308H Slim Hang-On Aquarium Filter | up to 70L (Nano–2 ft) | Fish Bazaar
Rs. 2,110.00
Taxes included.
Shipping calculated at checkout.
The Sobo WP-308H slim hang-on aquarium filter is a compact, affordable hang-on-back (HOB) filter for small and nano fish tanks up to roughly 70 litres (around 2 feet), with an ultra-slim profile that barely protrudes behind the tank. It hangs on the rim, returns filtered water over the surface, and provides simple 3-stage filtration — making it one of the best-value small aquarium filters available in India for nano and betta tanks.
What is the Sobo WP-308H Filter?
Short answer: A slim, budget hang-on-back (HOB) aquarium filter for small and nano tanks up to about 70 litres.
In detail: The WP-308H clips onto the back rim with a very slim body, lifts water through a filter cartridge, and trickles it back over the surface. It is easy to install and clean, and well suited to nano and small community tanks. Check the product listing for the exact flow rating. For example: on a 1.5–2 foot nano or betta tank, the WP-308H keeps the water clear and gently circulated without taking up space inside the tank.
Key Features
- Ultra-slim hang-on design — minimal footprint behind the tank.
- Gentle, small-tank flow — suited to nano and betta setups.
- 3-stage filtration — mechanical, biological and chemical in the cartridge.
- Surface agitation — the return flow aerates the water.
- Easy maintenance — quick cartridge access for cleaning.
- Great value — effective HOB filtration at a low price.
Benefits
Immediate: Clear water and gentle surface circulation from day one, with simple hang-on installation.
Short-term: The media matures into a biological filter, keeping ammonia and nitrite at zero in small tanks.
Long-term: Dependable, low-cost filtration for nano tanks, with cheap and easy media changes.
How It Works
The pump lifts water through the cartridge — mechanical media traps debris, biological media grows the bacteria that convert toxic ammonia to nitrite and nitrate, and chemical media (carbon) polishes the water — then returns it over the surface. See how aquarium filters work.
Which Tank Size Is the WP-308H For?
Short answer: Small and nano tanks up to about 70 litres — roughly up to 2 feet.
| Tank length | Approx. volume | WP-308H suitability |
|---|---|---|
| 1 ft | 10–15 L | Good (gentle flow) |
| 1.5 ft | 25–35 L | Ideal |
| 2 ft | 50–70 L | Good |
| 2 ft+ | 70 L+ | Step up to the Sobo WP-408H or a larger HOB |
Suitable For
- Nano and small community tanks
- Betta tanks (gentle flow; baffle if needed)
- Beginner and budget setups
Not Suitable For
- Tanks over 70 L — choose the WP-408H or a larger HOB
- Heavily-stocked or messy-fish tanks — limited media capacity
- Rimless tanks where a HOB cannot hang securely
Setup & Usage
Hang the filter on the back rim, fit the cartridge, prime it with tank water, and switch on. Rinse the media in old tank water every 2–4 weeks. Allow 4–6 weeks to cycle. See the installation guide.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | Sobo WP-308H (slim hang-on) |
| Filter type | Hang-on-back (HOB), slim |
| Suitable tank size | up to ~70 L |
| Flow rate | Small-tank rated (verify on listing) |
| Filtration stages | Mechanical, biological, chemical |
| Best for | Nano & betta tanks up to 2 ft |
Common Problems It Solves
Limited space: the ultra-slim body barely protrudes. Strong current in small tanks: its gentle flow suits nano and betta setups. Tight budgets: effective filtration at a low price. Cloudy nano water: 3-stage filtration keeps it clear.
Sobo WP-308H vs Other Filters
| Feature | Sobo WP-308H | Sobo WP-408H | Sponge filter |
|---|---|---|---|
| Best tank size | up to 70 L | up to 100 L | up to ~60 L |
| Flow | Gentle | Moderate | Gentle |
| Profile | Ultra-slim | Slim | In-tank |
| Price | Affordable | Affordable | Affordable |
Expert Recommendation
For a nano or betta tank where space and gentle flow matter, the Sobo WP-308H is a great budget slim-HOB pick. Add a little TCWS Bio-Media to boost biological capacity, and pair with a Sobo air pump in warm weather.
Frequently Asked Questions
What tank size is the Sobo WP-308H suitable for?
Small and nano tanks up to about 70 litres — roughly up to a 2 foot aquarium.
Is the WP-308H a hang-on filter?
Yes — it is an ultra-slim hang-on-back (HOB) filter for the rear rim of the tank.
Is the WP-308H good for a betta tank?
Yes — its gentle flow suits bettas; baffle the outflow if the current is still too strong.
WP-308H vs WP-408H — which should I choose?
Choose the WP-308H for nano tanks up to ~70 L and the WP-408H for small tanks up to ~100 L.
Does the WP-308H come with media?
Yes, it includes a filter cartridge; add bio-media such as TCWS Bio-Media for more capacity.
How often do I clean the WP-308H?
Rinse the media in old tank water every 2–4 weeks; never under the tap.
Is the WP-308H quiet?
Yes, when primed and topped up; keep the water level correct so the pump does not run dry.
Can the WP-308H be the only filter in my tank?
Yes, for nano and small tanks up to about 70 litres it provides complete filtration.
Is the Sobo WP-308H good for beginners?
Yes — it is simple, affordable and easy to maintain, ideal as a first nano-tank filter.
Is the WP-308H good value in India?
Yes — it is an affordable, space-saving slim HOB for nano and betta tanks.
Do I need an air pump with the WP-308H?
Not usually, but in hot Indian summers an air pump adds extra oxygen.
Related Products & Guides
Step up: Sobo WP-408H, Seachem Tidal 55. Top filter option: Sobo WP-880F. Media & aeration: TCWS Bio-Media, Sobo air pump. Collections: Aquarium Filters, Filters & Filtration. Guides: Types of Aquarium Filters, How to Reduce Filter Flow.
Conclusion
The Sobo WP-308H slim hang-on aquarium filter is a compact, affordable, gentle-flow choice for nano and small tanks up to about 70 litres (up to 2 ft). With an ultra-slim design and simple 3-stage filtration, it keeps nano and betta tanks clear and healthy — one of the best-value small aquarium filters in India.
Shipping & Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.
We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
