I am supposed to be in the first day of my 3 day blackout due to my BGA problem, but I don't know how to wrap up the tank! I have covered all the glass sides with thick black card, but how do I do the top? I tried draping towels over it but they dipped in the middle and got soaking wet! Also I can't find the original lid for the tank anywhere!! Obviously it needs to be something that won't let any light in, I still have lily pipes etc to contend with, any help would be great! :?