I'm planning to keep a few bichirs in my new 75g tank, and one thing I keep hearing is to make sure that the tank is covered tightly. Do my lids look secure enough? They're just regular Aqueon glass lids with the plastic extensions, and there's also a canopy. Yes, there's a big hole in one of the plastic pieces - I'll be replacing it with one that isn't broken. Aside from that, the tank has an overflow so there aren't any big openings for filters or other gear. There's an airline tube sticking out of the overflow that creates a very small gap. On the other side, there's another small gap where there's a zip tie attached to the canopy to hold up the spray bar.






