Keeping multiple betta fish in one tank can be challenging due to their aggressive nature. This DIY project offers a simple and cost-effective solution: a customizable aquarium divider. Forget expensive store-bought options; this guide shows you how to create a secure and easily adaptable divider using readily available materials like plastic mesh and poster board frame clips. The design allows for visual interaction between the bettas while maintaining necessary separation to minimize aggression. This project is perfect for anyone looking for a budget-friendly way to safely house multiple betta fish in a shared space, without sacrificing their well-being.This step-by-step guide will walk you through the process of building a divider that's both functional and easy to install and remove. We'll cover modifications made to address unexpected betta behavior, ensuring a final product that effectively separates your fish while allowing visual interaction. The instructions are clear and concise, making this project accessible even for beginner DIY enthusiasts. Get ready to create a peaceful and harmonious environment for your betta companions without breaking the bank!
Read more: Fish Tank Dividers: A Comprehensive Review of Types and Uses
Building the Divider: Materials and Construction
Creating a divider for a 10-gallon tank to house two betta fish can be easily achieved with readily available materials. This project utilizes a small mesh plastic piece, readily cut to size with scissors. This ensures a precise fit within the aquarium.

The divider's framework is constructed using small clips salvaged from poster board frames, commonly found in department stores. These are meticulously cut to the exact dimensions of the mesh using an X-Acto knife for a seamless integration.

Once the clips are precisely cut, the assembly is straightforward. They slide effortlessly into position along the mesh's bottom and sides, providing a stable structure. Hot glue is used to secure the clips, ensuring a strong and lasting bond.

Installation and Adjustments
The finished divider is designed for easy installation and removal. It slides smoothly into the aquarium, requiring no permanent attachment to the tank itself. Suction cups are strategically placed on the sides for stability, while the substrate will keep the bottom secured.

Initially, a simple design was sufficient; however, one betta proved quite persistent, finding a way between the divider and the tank wall. This unforeseen challenge required a slight modification to prevent escape.

The solution involved cutting small notches into the black poster board frame pieces. These notches allow for the addition of smaller suction cups, creating a barrier that the betta could not bypass.

Results and Conclusion
Post-installation, the bettas have adjusted well, with a significant reduction in aggression. This demonstrates the divider's effectiveness in providing separation while still allowing visual interaction.

This DIY divider is a cost-effective, customizable solution for keeping multiple bettas. Its ease of construction and adaptability make it suitable for various aquarium sizes and configurations.
While initial modifications were needed in response to the bettas' behavior, the final design proved highly successful and offers a low-cost way to separate aggressive betta fish in a shared space.