Someone help me with my geckos?

ok well my iguana died finally so my kids put together some money and bought me 2 geckos as a gift and i realize they are the small geckos that dont normally get as big as leos or anything think of the backyard lizards thats as big as they will get now i have 2 a male and female i saved my 75 gal tank is that big enough for geckos the size of backyard lizards (again thats as large a they will be in the future thier still babies) i have a huge hide the big branch and water and food bowl but ive never owned geckos i have the temperate reptile mulch but im sure they need something else plz if you can tell me the kind of bedding they need? also how do i keep thier cage humid? (florida geckos) also what can i feed them? just basicly giveme the overall for small gecko care id say itd be like caring for a baby leo but like i sai never owned gecks before