Originally Posted by finnfinnfriend
Im sorry I have trouble understanding words sometimes... So a 1/4 inch is perfectly fine? Thanks for being patient with me.
Your welcome and Correct....
Your goal when using plastic veggie wrap is to help retain the heat and humidity over the water for the labyrinth organ. As long as you have some dead air space between the water and wrap-you don't need to worry about the Betta not having enough air-They are small fish and don't use that much anyway-plus, every time you lift a corner to feed, make water changes...etc at least once a day....this allows for the needed gas exchange. Not to mention it most likely won't be an air tight seal-due to any cords.