The only issue I had with the water temple was the key behind the longshot. The block was just perfectly hidden behind the chest.
http://cdn-android.apptap.com/img/870/mobi.colortrilogy.bitlink/267135850.png
https://i.chzbgr.com/completestore/12/10/5/uv4r7nGyrE6ylt2lHGWpiQ2.gif