i do not keep acanthurus anymore but i do knoe that they are a arid desert monitor so even a jersey summer on the hottest day is a somewhat cold day for them, no u could not do this say u had a 60 degree day at night it will be say 40 next day 55 where as in the great sandy desert they ill get cool nights but still get dry 90 plus often even in winter. and they like extra extra dry. u may be better off with black and white tegus they live closer to your temps but would still need to come in in nov. burt langerwarf has cool pics of his hibernating under snow!!!! but i bring mine in in nov, and keep them in 55 degree basemen ton wet dirt and leaves over winter. here on new jersey shore.

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