I definitely agree with Malum. It's a great size...if it wasn't bioactive.
The downside with BPs is they can produce such a large amount of waste and urine as adults that they will overwhelm the system you currently have.
I think the larger size can work as long as you're on top of scooping a majority of poop when it happens and overturning some of the soil regularly.
Or the larger size can just simply be a nice naturalistic setup without the bioactive to worry about.







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