acrylic properties

fugu

Member
i have a 170 gallon glass tank. i need to make a cover which the hood can sit ontop off. that i can then drill to make ventilation holes in in order to allow the water to breathe as my temperatures are getting pretty hich.would anyone know whether there is a special type of acrylic that needs to be used for marine aquaria or could i construct a cover out of standard commercial acrylic sheets?
all helps cheers.
 
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