You don't want to seal the entire top down in order to allow gases to exchange. You want to get fresh air in to replace carbon dioxide produced by the fish. The feeding hole in the front is more of a convenience so you could cover that up with a piece of tape if you wish. Evaporation is important in order to keep the tank cool. But IME high water temperatures are really the exception rather than the rule.
Counter surfing happens in all aquaria from time to time. I think you see it more in Evolves because of the small size of the aquarium and the type of fish that are commonly kept (danios, livebearers, tetras) are more prone to jumping when startled than other fish (catfish, gouramis, cichlids, etc...) that are kept more commonly in larger aquaria.
Andy
Counter surfing happens in all aquaria from time to time. I think you see it more in Evolves because of the small size of the aquarium and the type of fish that are commonly kept (danios, livebearers, tetras) are more prone to jumping when startled than other fish (catfish, gouramis, cichlids, etc...) that are kept more commonly in larger aquaria.
Andy