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I take it you took a 29g and took the trim off and then put acrylic pieces inside/on top of it to create a less expensive version of a synergy sump (or similar)? I've read some horror stories of acrylic baffles expanding in glass tanks once wet and eventually causing tank failure/leaking, hopefully you didn't cut them to fit tightly.
I've had Plexiglas baffles in my sumps for over 20 years. Never heard of this. Why would they expand when wet?
I've had Plexiglas baffles in my sumps for over 20 years. Never heard of this. Why would they expand when wet?
They will absorb water and expand
Don't claim to be an expert on the subject but acrylic does absorb water to some degree, the type of acrylic used will dictate how much expansion will occur. You can google for more information if you're interested.