GridFINity Lid – Modular Grid System for TopFin 10 Gallon Aquarium

The GridFINity Lid is a modular, Gridfinity-inspired lid system designed specifically for the TopFin 10-gallon rimmed aquarium. It transforms your tank into a customizable platform where you can attach and rearrange accessories just like a Gridfinity setup.

The lid features a grid structure that allows components to securely lock into place. Included is a planter cup design that slots into the grid while extending below it, allowing the planter to sit partially submerged. This makes it ideal for growing aquatic or semi-aquatic plants like pothos, letting the roots reach the water while keeping the top clean and organized.

The system is designed to be flexible and expandable—use it for planters, covers, mounts, or any custom modules you want to create. If you’re familiar with Gridfinity, you’ll feel right at home designing your own add-ons.

Features:

* Gridfinity-style modular lid system

* Designed for TopFin 10-gallon rimmed aquariums

* Lock-in grid for secure placement of accessories

* Included planter cup for growing plants directly in tank water

* Expandable platform for custom modules and accessories

Customization Options:

My current design is set up with the filter on the right side. If you’d like:

* A mirrored version with the filter on the left side, or

* A version with the filter positioned all the way to one end for a peninsula-style tank,

leave a comment and I can create that variation.

If you make custom modules or improvements, feel free to share them—this system is meant to grow with your ideas.