I'm in the process of covering my 20 long screen top with 0.093" acrylic sheeting. Going to be sealing it in and completely covering sheet with HVAC foil tape. Still undecided how much of actual screen I should leave uncovered for secondary heat source and/or ventilation. Right now, our house temp. is 70* w/35-40% humidity. Also planning on insulating 3 sides with 1/8" neoprene. "Frankentank", I call it!