Looks fantastic....Can I offer 1 piece of advice?
To make it look more natural, why don't you add some leaves or pine bark and some sticks from the garden (washed first) to cover the astro turf...it would make that enclosure look 100% better IMO.
You have done a fantastic job anyway, but the astro turf stands out too much beside that beautiful little pool for your guy to dip in! Not to mention they harbour bacteria when your animal defecates on it, it's a pain to clean unless you have spare pieces to put in. Trust me I have learnt from trial and error!
With a substrate just pick out the bits with poo on them and every so often replace the lot...easy peasy and looks really cool.
Well done!!!