How do you jump-proof your tanks?

[Stingraynut_Seattle]

2x4s stacked on top of the lid; My arro was smart and vengeful; when he was small and new I threw him in the big tank with a six pack of red bellies which were actually smaller then him; they proceeded to nibble and harass him so I moved him to an adjoining tank; I kid you not, when he reached about 12" he decided it was time for revenge and started to bash himself against the wall trying to get into the piranha tank for payback! He was one cool fish!

 

[Chango1]

I simply use egg create to cover the entire top of the tank and I cut it so that it snaps into place! I stull use the lights etc... this helps hold the egg create in place. I do have to refill my tank more often because of evaporation but that just means good gas exchange! I hope this helps!!