hi ive just finished 4ft by 2ft by 2ft viv for beardys cant go any further to i do ventilation..would it be ok to vent the whole back panel at top say 3 inches right along..or should i do likle a 4 inch by 4 inch vent on back at each end..or should i vent both ends on lid..please please help im ready to do this and sitting waiting info..thanks


