I have used Zilla 5.5, 10, 20L, and 40gal breeders all with sliding screen lids.
NEVER had a issue with any.
they took a fare share of abuse, and never broke any, or had issues...
Ive used them along with ZooMed UTHs, and exotherms...
and never had one problem at all.
Just my 0.02
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