For what its worth I currently use vision cages for my Lizards and love them. I will be building my bigger cages on my own simply because I don't like the high price tags on 8ft cages, but my visions hold humidity and temp well. Especially if you are going to be housing geckos you won't have a cage big enough to run into the sagging problems that visions have. I normally see the sag in 4ft or longer, for your geckos, if housing individually a V221 would be a nice size cage. Again just my 2 cents
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