Heya … if you don’t think it’s too ugly … I found a plastic box on Amazon that fits over the chambers with a little modding. Width-wise, it’s perfect, and even has a little rim around it that holds it in place (won’t slide off the tank). Length-wise it’s a bit long, but if you trim off the rim near the end (same end where you’d cut a hole for wires), it fits snug.
Amazon.com USA:
https://a.co/d/epY6qrq
Get the white one, not blue ... needs to be 3" wide.

Amazon.com USA:
https://a.co/d/epY6qrq
Get the white one, not blue ... needs to be 3" wide.

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