I really need some kind of lid for my 75 gallon, is there any cheap ones. Should i go with a diy screen? What materials should i use for it that are safe??
It may be tough to find something ready made for an enclosure that large. What are the dimensions? What you might do is make a wooden frame that fits around the top and then attach some chicken wire or similar metal mesh screen with fairly large holes (partly for ventilation, mostly for allowing as much light through as possible, if you are keeping the lights on top of the enclosure).