---
product_id: 281904181
title: "J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank"
brand: "j-star"
price: "€ 41.33"
currency: EUR
in_stock: true
reviews_count: 8
category: "J Star"
url: https://www.desertcart.de/products/281904181-j-star-extra-large-fish-breeder-box-for-aquarium-tank
store_origin: DE
region: Germany
---

# 7 x 2.75 x 6 in XL size Crystal-clear acrylic for full visibility Eco-friendly suction cups for secure mounting J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank

**Brand:** j-star
**Price:** € 41.33
**Availability:** ✅ In Stock

## Summary

> 🐠 Breed Brilliance: Elevate your aquarium game with crystal-clear control!

## Quick Answers

- **What is this?** J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank by j-star
- **How much does it cost?** € 41.33 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/281904181-j-star-extra-large-fish-breeder-box-for-aquarium-tank)

## Best For

- j-star enthusiasts

## Why This Product

- Trusted j-star brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Feeding Made Easy:** Top feeding hole lets you nourish fish without opening the box
- • **Durable & Eco-Friendly:** Premium acrylic and green suction cups built to last and protect
- • **Maximize Survival Rates:** Isolate fry and injured fish safely to boost breeding success
- • **Crystal-Clear Observation:** Watch births and behavior with zero visual obstruction
- • **Space-Smart Floating Design:** Wall-mounted & self-floating combo saves tank space effortlessly

## Overview

The J-star Extra Large Fish Breeder Box is a premium acrylic isolation tank designed for professional fish breeders and enthusiasts. Measuring 7 x 2.75 x 6 inches, it features a crystal-clear body for unobstructed viewing, eco-friendly suction cups for secure wall mounting, and a unique self-floating design that saves aquarium space. Ideal for isolating fry, injured, or aggressive fish like bettas and guppies, it includes a convenient top feeding hole to maintain water integrity during feeding. This durable, modern breeder box enhances fish survival rates and breeding success while fitting seamlessly into any contemporary aquarium setup.

## Description

Suspension Multifunctional Isolation Box 1. The acrylic breeder box can be used as a spawning box for viviparous fish such as betta, guppy, killifish, etc. 2. The fish breeder box can prevent baby fishes from being attacked by adult fishes and improve the survival rate of baby fishes. 3. Self-floating design and wall-mounted design, double-layer combination does not occupy space, unique floating design can move everywhere without sinking. 4. The crystal-clear aclimation box can watch the fishes without any obstruction, adding fun. When to use isolation box? 1. As a breeding box for viviparous fish, such as betta, guppy, killifish, etc. 2. Serve as a refuge for small fishes to avoid adult fish attacks. 3. Isolate the injured fish. 4. Isolate attacking fish. Specification Material: Acrylic Color: Transparent Dimensions: 3.94" x 2.75" x 5.11" (M) / 5.5" x 3.1" x 5.5" (L) / 7" x 3.1" x 6" (XL) Package includes: 1 x isolation box for aquarium 2 x suction cups SERVICE: If the product you received has any problems, please feel free to contact us.

Review: Good rev8 - Well protected for shipment
Review: Cheap and hard to separate halves. - Good idea bad design how to seperate the two halves without taking it out of the water impossible

## Features

- The breeder box can be used as spawning box for betta, guppy, etc. The fish isolation box can prevent small fish from attacking and improve the survival rate of fish.
- High-quality transparent materials, durable. Can safely and reliably breed, isolate or adapt to fish. Crystal transparent body. It's easy to observe the females giving birth.
- Space-saving and can float automatically, this acrylic isolation box can be fixed on the aquarium wall by suction cup. The two-level combination does not take up space.
- Perfect isolator for aggressive fish, injured fish, small fish, shrimp and other marine fishes. Fishes such as Betta, Guppy, Killifish, Clownfish and other small fishes.
- No need to open the cover when feeding because of the design with a feeding hole on the top. The suctions cup is made with Environment-friendly materials, better adsorption.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08S3DH52Y |
| ASIN  | B08S3DH52Y |
| Best Sellers Rank | #90,023 in Pet Supplies ( See Top 100 in Pet Supplies ) #69 in Fish Breeding Tanks |
| Brand Name | J-star |
| Color | Blue, Clear |
| Customer Reviews | 3.7 3.7 out of 5 stars (146) |
| Date First Available | January 5, 2021 |
| Date First Available  | January 5, 2021 |
| Included Components | aquarium breeder,breeder |
| Item Dimensions LxWxH | 7 x 2.75 x 6 inches |
| Item Package Dimensions L x W x H | 7.32 x 6.54 x 3.54 inches |
| Item Weight | 11.7 ounces |
| Item model number | 64d719b3-f2fe-4d0a-8e63-2246149d2eea |
| Item model number  | 64d719b3-f2fe-4d0a-8e63-2246149d2eea |
| Manufacturer | J-star |
| Manufacturer  | J-star |
| Material | Acrylic |
| Product Dimensions  | 7 x 2.75 x 6 inches; 11.68 ounces |
| Size | X-Large |
| Specific Uses for Product | Spawning, Refuge, Injury isolation, Attack isolation |
| Style | Modern |
| Target Audience Keyword | Fish |

## Product Details

- **Brand:** J-star
- **Color:** Blue, Clear
- **Included Components:** aquarium breeder,breeder
- **Material:** Acrylic
- **Special Feature:** Transparent
- **Specific Uses For Product:** Spawning, Refuge, Injury isolation, Attack isolation
- **Style:** Modern
- **Tank Volume:** 130.2 Cubic Inches
- **UPC:** 741416221336
- **Vivarium Type:** Fish Breeding Tank

## Images

![J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank - Image 1](https://m.media-amazon.com/images/I/61oJH-AW3XL.jpg)
![J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank - Image 2](https://m.media-amazon.com/images/I/71jOX5gcLtL.jpg)
![J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank - Image 3](https://m.media-amazon.com/images/I/718eLX860HL.jpg)
![J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank - Image 4](https://m.media-amazon.com/images/I/61lAhzlteuL.jpg)
![J-star Extra Large Fish Breeder Box for Aquarium Tank, Acrylic Breeding Box for Guppy/Betta/Shrimp/Clownfish, Baby Fish Hatchery & Isolation Tank - Image 5](https://m.media-amazon.com/images/I/615+mtZ6dzL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good rev8
*by I***N on October 13, 2025*

Well protected for shipment

### ⭐⭐⭐ Cheap and hard to separate halves.
*by F***N on September 8, 2025*

Good idea bad design how to seperate the two halves without taking it out of the water impossible

### ⭐⭐⭐⭐⭐ Great size!
*by L***B on October 18, 2024*

Does the job and doesn’t cramp the fish too much!

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-01*