So my gecko has 3 hides right now (warm, medium, and moist) and I was think of revamping her cage. If I get a new hide, do I need to replace an old one, or can I have 4 in her 10.gal cage?
If you can fit 4 hides into a 10 gallon cage, I don't why you couldn't. I think it would be fine, and it would give your gecko more places to hang out, which is better.