condensation

If they're not the standard cover/condensation lid, what do you use? I would like images then I can get some ideas. Thanks in advance

Hello, Just nicely bought a house (3 months ago) and to my 4 foot gourami community tank re-setup and all was going fine until the last few week. We have noticed mould/damp against a 2 walls in our house and loads of condensation on the windows. Has a bloke in to look at it and he said he...