hey, should i put water lvl at 50% on my tank?, i put a net lid, so if it jumps it dosent gets out of the tank, i prefer water at 80% what u think?
Your tank is much too small as it is. Don't give the fish any less water than they already have, just keep the top covered
how do u know my tank size?
Because you've posted it before? Your tank is 70 gallons and you have a red tail catfish (of all things) in with your arowana.